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April 16, 2014

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statistics-?mean average with lowest number out?
A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?
Monday, January 7, 2013 at 2:46pm by tony

statistics-?mean average with lowest number out?
A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?
Monday, January 7, 2013 at 3:26pm by tony

Statistics for Business
Arrange in order of value, lowest to highest. Q1 is 4th score, Q3 = eighth, average of two middle scores = median. Find the mean (average) = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. ...
Sunday, January 19, 2014 at 8:24pm by PsyDAG

statistics-?mean average with lowest number out?
remaining 5 tests total 341 points 6 tests with avg 60 = 360 only needs 19 more points. That doesn't sound right. If he needs an average of 60 on 7 tests, but one is dropped, does he need an average of 60 on the remaining 6? If so, he's home free. 5 of the first 6 tests had a ...
Monday, January 7, 2013 at 2:46pm by Steve

statistics
Range: Take the highest number and lowest number and subtract them. Median: Put the numbers in order from least to greatest and find the number in the middle by crossing off one from each end until one number is left. If two are left, take the average by adding them together ...
Friday, June 11, 2010 at 8:14am by Jen

Statistics: Range, Average Deviation, Standard Dev
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance. Subtract each of the ...
Tuesday, October 18, 2011 at 1:44am by PsyDAG

pre-algebra
The MEAN is the arithmetic average, the average you are probably used to finding for a set of numbers - add up the numbers and divide by how many there are The MEDIAN is the number in the middle. In order to find the median, you have to put the values in order from lowest to ...
Tuesday, March 25, 2008 at 11:22pm by Britney

statistics
First do this: 1. Find the mean, median, and range for each of the two data sets. The mean is the average. Add each set of numbers together and divide by 7 to find the mean. The median is the middle number. Arrange each set in numerical order and find the middle number. The ...
Saturday, August 13, 2011 at 6:28pm by Ms. Sue

statistics-?mean average with lowest number out?
I agree with Steve. http://www.jiskha.com/display.cgi?id=1357588019
Monday, January 7, 2013 at 3:26pm by Ms. Sue

mean, mediem, mode
The MEAN is the arithmetic average value. You get it by dividing the sum by the number of number in the series. The MEDIAN (not mediem)is the number that divides the largest 50% from the lowest 50% of the numbers in the series. The MODE is the number that occurs most often in ...
Saturday, December 8, 2007 at 12:29am by drwls

statistics
mmmmhhh? if the mean is 48, that means the average number was 48 so we divide each by 48, then subtract 35 to get 1 so what is the average of a bunch of 1's ?? then new mean is 1 illustration: lets simplify the question you are given the numbers 12, 18, and 24 the mean would ...
Friday, February 26, 2010 at 12:42am by Reiny

Statistics
1a. Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Range = highest score...
Saturday, October 5, 2013 at 3:55pm by PsyDAG

Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard...
Thursday, May 9, 2013 at 1:16pm by Anonymous

statistics
though if you're going off of the mean (average) week 4 would get 55 customers oddly enough the median (middle number) is 55 as well. There is no mode (most common number) to calc. average, 30+55+80=165/3=55
Thursday, October 20, 2011 at 1:24pm by Kevin

Business Statistics
First, calculate the mean (average) number days lost. The deviation, for any observation, is the difference between the observed value and the mean.
Sunday, December 13, 2009 at 4:52pm by economyst

Statistics
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance There is no mode for ...
Saturday, September 10, 2011 at 4:14pm by PsyDAG

math
range: difference between the highest and lowest value of a data set mean: average of the #'s in a data set mode: # that occurs most often in a data set (the one that repeats the most) median: the middle value of a set of data that is ordered from lowest to highest. (numbers- ...
Monday, August 27, 2007 at 6:08pm by ~christina~

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Reverse the process for the last two problems. first Quartile = 25 percentile or lowest 25% Second ...
Friday, April 27, 2012 at 5:04pm by PsyDAG

math
Does anyone know how to explain mean, median, mode and range mean?? mean-the average of a group of numbers median-the number that is in the middle in an in order group of numbers mode-most common number in a group of numbers range- the difference or interval between the ...
Wednesday, September 20, 2006 at 4:56pm by Callie

statistics
In a random sample of 50 babies 4 to 7 month old the average number of hours they slept per day turned out to be 14.2 hours with a standard deviation of 1.6 hours find and interpret a 90% confidence interval for the mean number of hours slept by babies at this age
Wednesday, June 6, 2012 at 9:57am by Julio

statistics
In a random sample of 50 babies 4 to 7 month old the average number of hours they slept per day turned out to be 14.2 hours with a standard deviation of 1.6 hours find and interpret a 90% confidence interval for the mean number of hours slept by babies at this age
Wednesday, June 6, 2012 at 9:58am by Julio

statistics
Is the distribution normal, positively skewed or negatively skewed? The average (whichever) rounds to 2. The mean is most influenced by deviant scores, so it would be the lowest in a negatively skewed distribution, having relatively more scores above it. The mode would be ...
Saturday, April 5, 2014 at 1:13pm by PsyDAG

Statistics
What I mean by a "running number" is that the average is always changing. If I turn in 10 homework assignments and the grades are as follows: 58, 87, 99, 90, 92, 95, 89, 90, 95, 91 then my average is 88.6. If I turn in 10 more assignments my average changes, we don't say that ...
Sunday, January 26, 2014 at 2:28pm by Help

statistics
OK, so selecting five numbers at random, I will use: 75, 76, 83, 91, 87 Mean: (75 + 76 + 83 + 91 + 87)/5 = 82.4 Median: is the middle number, so 83. Mode: is the number which repeats the most, so since no numbers repeat, there is no mode. Midrange: is the average of the ...
Thursday, December 13, 2007 at 8:34pm by The Prez

math AIG (Ms.Sue)
Range: Subtract the lowest number from the highest number. Median: Arrange the numbers in numerical order. Find the middle number. In this set, the median is the average between the two medians. Mode: Which number appears the most. Note there is no mode in this group. Mean: ...
Monday, November 14, 2011 at 5:44pm by Ms. Sue

statistics college
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Range = highest score - ...
Tuesday, May 22, 2012 at 9:47pm by PsyDAG

Statistics
The head librarian claims that books have been checked out an average of seven times in the last year. You suspect she has exaggerated the checkout rate and that the mean number of checkouts per book per year is, in fact, less than seven. Using the computerized card catalog, ...
Friday, May 2, 2008 at 12:43pm by Lindy

statistics
According to the standard bell curve and the empirical rule, the lowest 5% would be 2 standard deviations below the mean making the operating cost of the lowest 5% of airplanes equal to $1785
Sunday, November 21, 2010 at 3:44pm by Joe

Statistics
The sample mean is the sum divided by 8 (the number of people) Call than number Xm. The standard deviation is the square root of the average of [Salary ^2] - Xm^2. You could also calculate it as the square root of the average of [Salary -Xm)^2 The first way is faster.
Saturday, February 13, 2010 at 4:39pm by drwls

statistics
I don't know what you mean by the "five number summary." Could they be mean, mode, median, standard deviation and range? Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. ...
Wednesday, March 7, 2012 at 8:28am by PsyDAG

statistics
Divide the sum of squares by N and work with the averages. Let's use the notation: <X> for the average of X. E.g.: <X> = ∑(X)/N = Mean And: <(X-<X>)^2> = <X^2 - 2X<X> + <X>^2> = <X^2> - <X>^2 Note that <a X> = a...
Wednesday, August 29, 2007 at 12:15pm by Count Iblis

statistics
Range = highest score - lowest score Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root ...
Saturday, October 16, 2010 at 12:21am by PsyDAG

statistics
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Mode = most frequently ...
Sunday, November 13, 2011 at 3:58pm by PsyDAG

math
A teacher allows the students to each "throw out" their lowest test score in order to increase their overall grade. The original mean score of 5 tests is 72.8. After the removal of the lowest test, the mean score becomes 78.5. What is the score of the removed test? A) 53 B) 50...
Sunday, April 4, 2010 at 10:57pm by Nicci

Statistics
Mode is most frequently occurring score. For median, arrange in order of value and choose middle-most value. Range is highest-lowest values. To find the mean, sum scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of ...
Sunday, September 18, 2011 at 1:52pm by PsyDAG

science
Curiously, it is a good question. The average daily temperature is not the same as the mean. Usually, average daily temperature is calculated by adding the high and low temperatures for the day, and dividing by 2. It doesn't mean much, but it is a simple calculation. Average ...
Tuesday, May 19, 2009 at 4:24pm by bobpursley

statistics
4. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the bottom 5% of students will fail the examination, what is the lowest score, to the nearest whole number, that a student can have and pass?
Thursday, February 3, 2011 at 12:49am by loni

statistics
Range = highest value - lowest For variance and standard deviation: Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. ...
Saturday, October 16, 2010 at 6:02pm by PsyDAG

statistics
the mean is based off of 3 months. multiply it out to get the mean for a correct time period (1.5x4=6). I use the Poisson function in excel. Mean is equal to 6 and x is equal to 12 and 0. True is up to a certain number (up to 12) and false is exactly a certain number (exactly ...
Friday, September 30, 2011 at 7:12pm by Richard

STATS
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Reverse the process for the last 2 problems. 30th percentile = lowest 30% 8th decile = lowest 80%
Friday, April 27, 2012 at 10:56pm by PsyDAG

statistics
I'll use an example. Hopefully, this will help you with your problem. Suppose we had these scores: 3, 4, 5, 5, 5, 10, 10. To find the mean, add up all the scores and divide by the total number of scores. The total number of scores is 7. Therefore, the mean is 42/7 = 6. The ...
Wednesday, December 8, 2010 at 7:16pm by MathGuru

statistics
A study of peach trees found that the average number of peaches per tree was 625. The standard deviation of the population is 140 peaches per tree. Ascientist wishes to find 80% confidence interval for the mean number of peaches per tree. How many trees does she need to sample...
Tuesday, June 18, 2013 at 8:04pm by betsy

Statistics
I have a couple questions I answer for home work could some look atthem and tell me If I am doing them right I also am having problems understanding the variance and standard deviation are the site you can suggest that would help with this I need a step by step help 11. For ...
Friday, February 6, 2009 at 7:38am by KEENE

Statistics
If by "out of control" you mean deviant, I would agree. Baseline is not the same as average. It is the cutting point at which you will reject the product. It would depend on the quality standards you have for your product. An an analogy, let's use academic grades. "C" would be...
Sunday, January 26, 2014 at 2:28pm by PsyDAG

statistics
A university dean wishes to estimate the average number of hours his part-time instructors teach per week. The standard deviation is 2.6 hours. How large a sample must be selected if he wants to be 95% confident of finding whether the true mean differs from the sample mean by ...
Wednesday, March 30, 2011 at 10:13pm by bob

Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard...
Friday, May 3, 2013 at 11:45am by Cam

Statistics
28. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week. Based on a simple random sample, they surveyed 144 students. The statistics showed that students studied an average of...
Saturday, October 22, 2011 at 7:43pm by Steph

statistics
basically i'm at the begining of the text book doing summer work it's talking about mean and stuff asked to find the mean of a set of data and given 14 different numbers the question then goes on and tells me a fifteenth number is added to the set of data with the value of ...
Wednesday, July 15, 2009 at 10:13pm by statistics

Statistics
In probability and statistics, mean is used to refer to one measure of the central tendency either of a probability distribution or of the random variable characterized by that distribution. In statistics and probability theory, the standard deviation (represented by the Greek...
Thursday, October 17, 2013 at 6:05pm by John

statistics
You are responsible for planning the parking needed for a new 256-unit apartment complex, and you are told to base the needs on the statistic average number of vehicles per household is 1.9. Which average (mean, median, mode) would be best if: You wanted to be assured that...
Saturday, April 5, 2014 at 1:13pm by Bridge

geometry
a salesperson drove 238,259,87,163and 198 miles on a 5 day trip what was the mean number of miles driven per day? please Add the 5 numbers together. Then divide by 5 to find the mean (average) number of miles she drove each day. what is a mean A mean is the average. To find ...
Tuesday, June 12, 2007 at 7:34pm by isaiah

math - statistics
Suppose that the number of insects captured in a trap on different nights is normally distributed with mean 2950 and standard deviation 550. b) Suppose that we change the location of a trap whenever it captures a number of insects that fall in the lowest 5%. If a trap was ...
Monday, November 6, 2006 at 10:34pm by Lindz

5th math
Mean is the average ADD the number of letters and divide by the number of numbers. 105 + 97 + 88 + 86 = sum Average = sum/4
Wednesday, January 26, 2011 at 11:11pm by helper

statistics
If the average commute time is 10.9 miles, but the average is actually the mean of a sample of 300 commuters and the sample standard deviation is 6.2 miles Estimate the true mean commute distance using 99% confidence level.
Saturday, November 23, 2013 at 3:00pm by Mel

math
1. Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance 2-4. Z score = Score ...
Wednesday, April 13, 2011 at 9:47am by PsyDAG

college
Average means that if you add up all the rain for a number of years and divide by that number....Then you will have an average. It does not mean that it will only rain that much every year.
Tuesday, September 2, 2008 at 12:13pm by GuruBlue

Statistics
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled is normal. If...
Tuesday, August 2, 2011 at 2:49pm by Anonymous

Statistics Help Please
It is a mean, or average. The company is using random samples to get the mean life expectancy of its policyholders.
Monday, November 12, 2007 at 1:25pm by Michael

statistics
Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,225 per hour and a standard deviation of $220. What is the operating cost for the lowest 5 percent of the airplanes?
Sunday, November 21, 2010 at 3:44pm by Barbara

Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, their average ...
Tuesday, February 25, 2014 at 3:13pm by Ray

Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, their average ...
Tuesday, February 25, 2014 at 5:39pm by Ray

Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, their average ...
Tuesday, February 25, 2014 at 7:10pm by PLEASE HELP!!!!!!!!!

Data analysis and statistics
Median is the middle number. First sort the numbers: I get 1,4,9,14,15,25,36. The middle (median) is 14. Mode is the most common occurance. You have two '8s', three '9s', two '10s' and one of everything else. The mode is therefore 9. Mean is the average -- sum the series then ...
Sunday, April 13, 2008 at 8:42pm by economyst

statistics
Consider the average available for all hotel rooms from the previous assignment. Identify the point estimate of the average number of available hotel rooms in this lesson from each sample. Construct and Interpret a 95% confidence level for the true mean number of available ...
Tuesday, August 2, 2011 at 6:54am by tom

Math/Statistics
A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of 82 and a standard deviation on 8. Find the score which separates the top 10% of the scores from the lowest 90% of the scores.
Sunday, August 11, 2013 at 8:51pm by Sean

statistics
When you add the values 3, 5, 8,12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?
Monday, April 19, 2010 at 4:11pm by Anonymous

statistics
When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?
Tuesday, June 29, 2010 at 9:01am by Anonymous

statistics
When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?
Monday, September 6, 2010 at 11:46am by Anonymous

statistics
Average = mean = Σx/n X= value of scores and n = number of scores. I am assuming that here you are using n merely as another score. 85 = (80+95+100+75+n)/6 Solve for n.
Monday, February 27, 2012 at 9:38pm by PsyDAG

statistics
When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?
Monday, April 22, 2013 at 7:45am by Anonymous

Hypothesis
You need to consult your statistics text for the methods involved. However, I will start you out. Since you are only concerned with whether the class (mean 2) scored higher, it is a one-tailed test. Ho: mean 1 = mean 2 H1: mean 1 < mean 2 I'll leave the rest to you.
Monday, November 16, 2009 at 7:54pm by PsyDAG

BUSSINESS STATISTICS
Consider the average available for all hotel rooms from the previous assignment. Identify the point estimate of the average number of available hotel rooms in this lesson from each sample. Construct and Interpret a 95% confidence level for the true mean number of available ...
Sunday, May 6, 2012 at 5:40pm by JULIET

Math
If you told someone that the greatest depth of Lake Superior is 1333ft would you be expressing a number similar to mode, median, mean or range? That would be the range. The mode is the numbers that appear most often. Median is the middle number and mean is the average. I don't...
Monday, April 23, 2007 at 5:17pm by Connor

Statistics
I have a problem I need some help on. I have answered parts. Any guidance would be appreciated. K For many years the numbers of accidents per week at a hazardous intersection have been studied. The number of accidents per week varies with mean 2.2 and standard deveiation 1.4. ...
Saturday, August 4, 2007 at 12:21am by Kayse

Statistics
For mean, you add up all numbers and divide by the size of the population. For median, you need to sort them in increasing order, and take the mean of the two middle numbers (average between 25th and 26th values for N=50). Since the data represent the whole population, they ...
Sunday, May 26, 2013 at 6:35pm by MathMate

Statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 30 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Wednesday, October 26, 2011 at 9:35pm by Carmella

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Wednesday, October 26, 2011 at 10:41pm by Marcus

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Monday, December 19, 2011 at 4:38pm by sarah

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Sunday, January 15, 2012 at 10:19pm by Sara

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Monday, February 13, 2012 at 2:11pm by Anonymous

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Saturday, February 18, 2012 at 4:49pm by Miller

statistics
. Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Tuesday, June 12, 2012 at 8:35am by stacy

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Saturday, June 16, 2012 at 9:04pm by Kebo

statistics
6. Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Tuesday, December 11, 2012 at 9:45pm by pat

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Monday, May 27, 2013 at 8:16pm by Ann

Statistics/probability/maths
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled is normal. ...
Tuesday, August 2, 2011 at 12:33pm by evangeline johnny

statistics
Using the numerical data for your team project, conduct a two sample, two-tailed hypothesis test for the mean, with a 0.05 level of significance. Find and interpret each step. H0: H1: Test statistic = Critical value = p-value = Reject the null hypothesis or do not reject the ...
Sunday, July 8, 2012 at 1:17pm by Anita

Statistics
linear correlation between the number of years in college versus average pay. average pay= 1,000 + 15,000x where x is the number of years in college. What would your average pay be if you were in college 2 years based on the model?
Wednesday, August 28, 2013 at 5:06pm by Mary

Statistics
linear correlation between the number of years in college versus average pay. average pay= 1,000 + 15,000x where x is the number of years in college. What would your average pay be if you were in college 2 years based on the model?
Wednesday, August 28, 2013 at 6:52pm by Mary

statistics
a. mean = sum of scores/number of scores b. Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance c. 95% = mean 1.96 SD d. Ho: ...
Monday, May 9, 2011 at 11:28am by PsyDAG

Geometry
Mean= The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. Median= The "median" is the "middle" value in the list of numbers. To find the median, your numbers have to be listed in numerical order, so you may ...
Saturday, April 4, 2009 at 2:55pm by Riley

statistics
H0: X = Y The mean (average) gas price in city X equals the mean (average) gas price in city Y during January 2012. H1: X Y The mean (average) gas price in city X does not equal the mean (average) gas price in city Y during January 2012.
Sunday, July 8, 2012 at 1:14pm by Anita

Statistics
The relationship between the number of games won during one season by a minor league baseball team and the average attendance at their home games is analyzed. A regression analysis to predict the average attendance from the number of games won gives the model y-hat = -2600 + ...
Saturday, May 25, 2013 at 11:19pm by Katie

statistics
Is that the lowest 30th percentile? Or is it the lowest 30 percent of the total score?
Thursday, April 19, 2012 at 8:18pm by Ms. Sue

Math
Mean = total/number of times So total=mean*number of times =6*9=54 Arrange 12,7,3,10,9, 2, 11, 7 and 8. in ascending order 2 3 7 7 (8) 9 10 11 12 The median is the number which has the same number of numbers higher as lower. In this case, 8 is the middle number, or the median...
Tuesday, March 8, 2011 at 5:42pm by MathMate

Statistics
The mean is the average of all of the numbers. Add them and divide by 16. The median is the middle number. Arrange the numbers in order and then find the middle.
Thursday, August 11, 2011 at 6:14pm by Ms. Sue

statistics
I'm not sure what you mean by considering "in groups of 3." Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard ...
Tuesday, April 9, 2013 at 11:09am by PsyDAG

Math
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation (SD) = square root of variance Range = highest ...
Sunday, October 30, 2011 at 8:32pm by PsyDAG

statistics
to get the mean, add them up , then divide by 7 I get 168/7 = 24 (how can the average of your numbers possibly be 335 ??? The average must always lie between the smallest and the largest) your median and mode are correct
Thursday, November 14, 2013 at 11:00pm by Reiny

5th grade math
Pat, the range is simply the highest value in a given set minues the lowest so for this problem you have to put the numbers in order from least to greatest than take the higest number and subtract in from the lowest. In this case that is where the 49 comes from. Which of this ...
Wednesday, February 9, 2011 at 9:10pm by Jean

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