Thursday

April 17, 2014

April 17, 2014

Number of results: 57,236

**Statistics**

For a population with a mean of µ=60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64 scores
*Friday, December 13, 2013 at 7:12pm by Lyndyc*

**Statistics**

For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores c) a sample of n=25 scores Are the sample mean (...
*Tuesday, May 24, 2011 at 2:44pm by Aestas*

**Statistic**

For a population with a mean of μ 70 and a standard deviation of 20, how much error, on average, would you expect between the sample mean (M) and the population mean for each of the following sample sizes? a. n 4 scores b. n 16 scores c. n 25 scores
*Friday, February 1, 2013 at 10:58pm by Cookie *

**Math **

I need help with this these two problem PLEASE!!! For a population with a mean of μ 80 and a standard deviation of 12, find the z-score corresponding to each of the following samples. a. M 83 for a sample of n 4 scores b. M 83 for a sample of n 16 scores c. ...
*Friday, February 1, 2013 at 11:03pm by Tracy*

**statistic **

In a population of exam scores, a score of X 48 corresponds to z1.00 and a score of X 36 corresponds to z –0.50. Find the mean and standard deviation for the population. (Hint: Sketch the distribution and locate the two scores on your sketch.) A sample consists of the ...
*Saturday, January 26, 2013 at 6:46pm by Nickie*

**statistics**

Find the mean first = sum of scores/number of scores Sum of scores = (.05) + 2(.16)... + 8(.02) = ? Number of scores = 1 + 2 + 3... + 8 Subtract each of the scores (.05, .16, .16, .2, .2, .2....) from the mean and square each difference. Find the sum of these squares. Divide ...
*Saturday, April 9, 2011 at 1:41pm by PsyDAG*

**statistics**

Use a z-table and z-scores. You will have to account for the sample size, so here is the formula: z = (x - mean)/(sd/√n) For a): calculate two z-scores z = (475 - 514.6)/(84.6/√4) z = (525 - 514.6)/(84.6/√4) Once you have the two z-scores, find the ...
*Thursday, April 19, 2012 at 11:14am by MathGuru*

**Statistics**

Suppose that a sample of 50 scores has a mean of Y=90 and the standard deviation is 15. Between what two values of Y will at least 90% of the scores fall? What is the maximun number of scores that can lie out of the interval?
*Sunday, October 30, 2011 at 1:33pm by Sara*

**statistics**

On average, a sample of n=100 scores will provide a better estimate of the population mean than would be obtained from a sample of n=50 scores. (True or False)
*Tuesday, July 5, 2011 at 7:10pm by Anonymous*

**Statistics**

Although you indicate n = 17, you only have 16 scores listed. 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...
*Saturday, December 7, 2013 at 9:02pm by PsyDAG*

**stat.**

A sample consists of the following n 6 scores: 2, 7, 4, 6, 4, and 7. a. Compute the mean and standard deviation for the sample. b. Find the z-score for each score in the sample. c. Transform the original sample into a new sample with a mean of M 50 and s 10.
*Sunday, January 27, 2013 at 11:31am by Nickie*

**statistics**

a sample of n=25 scores has a mean of M=60 and a std dev of s=12. Find the z-score corresponding to each of the following scores from this sample. X=66,X=48,X=84,X=55
*Thursday, February 7, 2008 at 10:45pm by annabelle*

**Maths - IQR**

Interquartile range is the middle 50%, found by subtracting Q1 from Q3. x bar is the sample mean. Add all the scores in the sample and divide by the number of scores.
*Thursday, March 31, 2011 at 8:45am by PsyDAG*

**business statistics**

The scores on a standardized exam are normally distributed with mean= 50 and variance=16. (a) what percentage of the scores exceed 58? (b) what percentage of the scores lie between 38 and 54? (c) what is the 84th percentile of the distribution?
*Sunday, February 20, 2011 at 7:40pm by Julie*

**Statistics**

Use z-scores. Formula for this problem: z = (x - mean)/(sd/√n) Find two z-scores, using 2.84 for x and also 2.86 for x. Mean = 2.835 and sd = 0.15. Sample size n = 100. Once you find the two z-scores, use a z-distribution table to determine your probability between the ...
*Sunday, June 23, 2013 at 5:00pm by MathGuru*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a.Percentage of scores less than 100b.Relative frequency of scores ...
*Tuesday, June 8, 2010 at 12:50pm by Kim*

**statistics**

FICO Scores The FICO credit rating scores obtained in a simple random sample are listed below. As of this writing, the reported mean FICO score was 678. Do these sample FICO scores appear to be consistent with the reported mean? 714 751 664 789 818 779 698 836 753 834 693 802
*Sunday, August 7, 2011 at 11:02pm by Anonymous*

**statistics**

1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below 20?
*Tuesday, September 27, 2011 at 10:29pm by Mich*

**Math**

The individual scores you have been given are raw scores. 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 ...
*Monday, October 3, 2011 at 6:37pm by PsyDAG*

**statistics**

Find z-scores using sample size: z = (x - mean)/(sd/√n) For a): x = 45, 55 mean = 50 sd = 10 n = 16 Find two z-scores, using the values above. Use a z-table to find the probability between the two scores. For b): x = 48, 52 mean = 50 sd = 10 n = 16 Find two z-scores, ...
*Monday, October 15, 2012 at 1:20am by MathGuru*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b.Relative frequency of scores less than 120 c.Percentage of scores less ...
*Sunday, November 21, 2010 at 4:59pm by TAW*

**Math-statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantiles: a.percentage of scores less than 100 b. relative frequency of scores less than 120 c. percentage of scores less ...
*Friday, March 1, 2013 at 6:31pm by Jane Brown*

**Statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*Wednesday, March 31, 2010 at 2:39pm by Ab*

**statistics**

Assume that a set of test scores is normally distrbuted with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first.... a. Percentage of scores less than 100. b. Relative frequency of ...
*Saturday, May 8, 2010 at 4:19pm by Renee*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*Tuesday, July 13, 2010 at 1:44pm by Ab*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*Saturday, August 20, 2011 at 7:28pm by ann*

**Statistics... I need help**

. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: (Hint: Make a drawing and label first) a. Percentage of scores less than 100 b. Relative frequency of scores ...
*Monday, April 19, 2010 at 2:11am by Adam*

**statistics**

Use z-scores and a z-table for this problem. Because you are given a sample size, you will need to include the sample size in the calculation: z = (x - mean)/(sd/√n) For a): This will be very close to 100% chance that the average of the draws will be in the range listed...
*Monday, October 27, 2008 at 10:11pm by MathGuru*

**statistics**

Calculate SS, variance, and standard deviation for the following sample of n _ 4 scores: 3, 1, 1, 1. (Note: The computational formula works well with these scores.)
*Wednesday, June 22, 2011 at 12:38am by Liz *

**statistics**

A sample of n=5 scores has a mean 50. Another sample has n=10 scores and a mean of 60. If the two samples are combined, will the combined sample mean be greater than 55
*Wednesday, February 9, 2011 at 8:15pm by Carrie*

**auguta tech**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0....
*Saturday, April 17, 2010 at 9:38pm by cynthia*

**PSY/315**

For median (b), arrange scores in order of value. Median = 50th percentile = point where half the scores are valued above and half below. (a) Mean = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these ...
*Wednesday, July 3, 2013 at 9:59am by PsyDAG*

**statistics ***pls help!**

for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 = 38 for the first sample, and s^2 =42 for the ...
*Thursday, April 14, 2011 at 11:40pm by jerr *******

**math**

Mean = Σx/n (add all the scores and divide by the number of scores) Median = 50th percentile (arrange scores according to value, find value that half of the scores are above and half below. If it is in between two scores, find the mean of those two scores. Mode = most ...
*Tuesday, May 11, 2010 at 11:59am by PsyDAG*

**statistics**

Mean = sum of scores divided by number of scores. (5*10 + 16)/6 = ?
*Sunday, September 18, 2011 at 10:06pm by PsyDAG*

**auguta tech**

a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0.0235+0.015+0.84 c. Percentage of scores less than 140 d. Percentage of scores less than 80 e. Relative frequency of scores less than 60 f. Percentage of scores greater ...
*Saturday, April 17, 2010 at 10:23pm by cynthia*

**statistics**

Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4 There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
*Friday, September 9, 2011 at 11:06pm by Jean*

**Statistics**

Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
*Friday, September 9, 2011 at 11:10pm by Jean*

**statistics**

5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
*Tuesday, November 29, 2011 at 12:12am by shirley*

**Statistics**

A distribution has a standard deviation of 12. Find the z-score for each of the following locations in the distribution. a. Above the mean by 3 points. b. Above the mean by 12 points. c. Below the mean by 24 points. d. Below the mean by 18 points. For the following ...
*Saturday, January 26, 2013 at 2:35pm by Nickie*

**Statistics**

One sample of n=20 scores has a mean of M=50. A second sample of n=5 scores has a mean of Mean=10. If the two samples are combined, what is the mean
*Wednesday, October 26, 2011 at 11:58pm by Sher*

**Math Statistics?**

If your question relates to statistics, any distribution of scores can only have one median — the point at which 50% of the scores have a lower value and 50% of the scores have a higher value. If the median lies between two scores, then the value of the median can be found by ...
*Wednesday, June 3, 2009 at 3:15pm by PsyDAG*

**statistics**

In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the results obtained in the study. Note that the scores...
*Wednesday, June 22, 2011 at 12:39am by Liz *

**Statistics**

a. An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. b. The training program will not change the test ...
*Friday, December 20, 2013 at 10:36pm by PsyDAG*

**Statistics**

Given that a population of scores is normally distriibuted with u=100 and o=8, determine the following: a. The percentile rank of a score of 120 b. The perentage of scores that are below a score of 99 c. The percentage of scores that are between a score of 101 and 122 d. The ...
*Wednesday, August 14, 2013 at 1:26pm by Grand Canyon University*

**algebra (incomplete)**

What type of distribution of scores is it? Normal? Skewed? Bimodal? MAD is the arithmetic average of the scores? It serves as a fulcrum (balance point) for the scores?
*Thursday, March 21, 2013 at 2:34am by PsyDAG*

**math**

Are you sure there are no typos in your data? If so, find the Z scores for both scores. Z = (score-mean)/Standard deviation In the back of your stat text, find the Z scores in a table labeled something like "areas under the normal distribution." Find the proportion between the...
*Wednesday, March 10, 2010 at 1:18pm by PsyDAG*

**statistics**

a distribution of scores has 6, but the value of the mean is unknown, a researcher plans to select a sample from the population in order to learn more about the unknown mean, if the sample consist of n= 9 scores , how accurately should sample mean represent the population mean
*Sunday, December 18, 2011 at 4:38am by herry*

**statistics**

The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 1. The range of the math scores equals the range of the verbal scores. 2. The...
*Tuesday, September 18, 2012 at 4:59pm by Gee*

**Math**

Find the mean first = sum of scores/number of scores (Use midpoint of classes as the values of the 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 ...
*Thursday, November 10, 2011 at 7:39pm by PsyDAG*

**statistics**

Using teh 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores less than 100 b. relative frequency of scores less than 120 c...
*Monday, May 10, 2010 at 11:12pm by Christine*

**probability and statistics**

a population forms a normal distribution with a mean of u=80 and a standard deviation of o=15. for each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative value or an extreme value for a sample ...
*Friday, January 6, 2012 at 3:03pm by darrell*

**Statistics**

If normal, the measures of central tendency should be approximately equal. If skewed, the mean is most effected by deviant scores, so the skew will be in the direction of the mean. Mean = sum of scores/number of scores Mode = most frequently occurring score Median = 50% ...
*Tuesday, October 18, 2011 at 1:41am by PsyDAG*

**statistics**

In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these scores into SPSS and use plots and data ...
*Sunday, February 26, 2012 at 5:29pm by john*

**5th grade math**

The lowest number would be 50 and the highest is 57. That takes care of two scores. Since the mode is the most frequently occurring score, at least two scores will be 56. Still 8 scores remain. Insert the remaining scores so half will ≤ median and half ≥ median, ...
*Monday, January 28, 2013 at 9:03pm by PsyDAG*

**Statistics**

You have 30 scores. Arrange them in order of value. The middle 15 scores determine the interquartile range. In this case, it will be 7 1/2 scores above and below the median. I hope this helps. Thanks for asking.
*Sunday, March 29, 2009 at 5:22pm by PsyDAG*

**math**

In contrast to Average Man, I see 6 scores, 3, 7, 14, 15, 17, and 46, so n = number of scores = 6. With 6 scores, the median is the arithematic average of the two middle-most scores, in this case, 14 and 15. Since no score occurs more frequently than others, there is no mode.
*Sunday, November 15, 2009 at 7:37am by PsyDAG*

**Math**

A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample. What is the value for the new sample mean?
*Saturday, October 20, 2012 at 9:42pm by Sharon*

**stats**

A random sample of n=16 scores is obtained from a population with a mean of µ= 80 and a treatment is administered to the sample. After treatment, the sample
*Wednesday, March 20, 2013 at 2:04pm by delaney*

**Math -- Statistic types used in public speaking**

If the distribution of scores is normal, all these measures of central tendency will have essentially the same value. If the distribution is positively skewed (many lower scores and relatively few higher scores), the mode will have the lowest value, and the mean (most ...
*Saturday, October 6, 2007 at 7:25pm by PsyDAG*

**statistic**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b. Relative frequency of scores less than 120 ...
*Wednesday, August 24, 2011 at 3:17pm by Sonia*

**statistics**

. In a sample of n = 6, five individuals all have scores of X = 10 and the sixth person has a score of X = 16. What is the mean for this sample?
*Sunday, September 18, 2011 at 10:06pm by toonie*

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b...
*Monday, August 16, 2010 at 12:50pm by sweet*

**stats**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b...
*Monday, September 20, 2010 at 8:38pm by Jenn*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use teh 68-95-99.7 rule to find the following quantities: a. percentages of scores less than 100 b. relative frequency of scores less than 120 c.percentage of scores ...
*Monday, July 19, 2010 at 6:48pm by terry*

**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 ...
*Monday, September 20, 2010 at 1:36am by PsyDAG*

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 = ...
*Sunday, July 25, 2010 at 5:31pm by Trish*

**statistic**

Given a normal population with ě = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
*Wednesday, March 9, 2011 at 10:06pm by kim*

**ALGEBRA**

A. Range = highest score - lowest B. 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. I'll let you do the calculations.
*Friday, June 1, 2012 at 11:00pm by PsyDAG*

**statistics**

A psychologist wants to estimate the variance of employee test scores. A random sample of 18 scores had a sample standard deviation 10.4. Find a 90% confidence 2 interval for the population variance. What assumption, if any, have you made in calculating this interval estimate?
*Wednesday, November 9, 2011 at 9:21am by Janelle*

**Math**

Using the midpoints of each interval, to 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.
*Friday, May 27, 2011 at 12:15pm by PsyDAG*

**college**

The average and SD of a set of 50 scores are 30 and 7, respectively. If each of these scores is increased by 10, then which of the following is true for the new set of scores?
*Wednesday, December 15, 2010 at 10:40am by Anonymous*

**Statistics- Math**

Find both z-scores. Formula: z = (x - mean)/sd Once you have both z-scores, compare the scores. I hope this will help get you started.
*Friday, February 17, 2012 at 12:00pm by MathGuru*

**Math**

4). At diving competiotion, Jan's first dive recieved 9 scores that averaged 9.0. To calculate her final score for the dive, the highest and lowest scores were removed and the average was taken of the remaining seven scores. If her final score was 9.1, what was the sum of the ...
*Monday, December 13, 2010 at 8:22pm by Sherkyra8645*

**Discrete Mathematics**

A tutor website wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ...
*Tuesday, July 30, 2013 at 3:51am by Joy*

**Discrete Mathematics**

3. A tutoring site wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ...
*Tuesday, July 30, 2013 at 1:11pm by Joy*

**statics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first…Drawings need not be included in response...
*Monday, May 3, 2010 at 10:45pm by Anonymous*

**Essentials of statistics**

A populations of scores forms a normal distribution with a mean of 40 and a standard deviation of 12 what is the probability of selecting a sample of n=9 scores with a mean less than m=34
*Saturday, July 31, 2010 at 9:29pm by Anonymous*

**Algebra 2: Probability and Stats**

The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percent of the scores are greater than 87? * 68% * 16% * 84% * 2.5%
*Monday, May 24, 2010 at 7:06pm by Skye*

**Algebra 2**

Arrange scores in order of value. With 20 scores, each stands for 5% of the distribution. 30th percentile involves the six lowest scores. Can you generalize that for the 90 percentile?
*Monday, May 24, 2010 at 11:56pm 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. I'll let you do the calculations.
*Sunday, October 3, 2010 at 11:23pm by PsyDAG*

**stat**

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. I'll let you do the calculations.
*Tuesday, December 11, 2012 at 3:36am by PsyDAG*

**algebra**

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. I'll let you do the calculations.
*Tuesday, March 11, 2014 at 9:43pm by PsyDAG*

**statistics**

using the 68- 95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard diviation of 20. Use the 68-95-99.7 rult to find the following quantities: percentage of scores less than 100 relative frequency of scores less than 120. ...
*Thursday, August 19, 2010 at 11:09pm by margaret*

**statistics**

Calculate SS, variance, and standard deviation for the following sample of n=9 scores:2,0,0,0,0,2,0,2,0.(Note: The computational formula for SS works best with these scores.) I keep getting the wrong numbers. Thank You.
*Tuesday, January 29, 2008 at 6:47pm by Tracy*

**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*

**Math**

The sum of 11 scores was 4x11 = 44 The sum of 12 scores becomes 44 +16 = 60 The new mean (of 12 scores) is 60/12 = 5
*Saturday, October 20, 2012 at 9:42pm by drwls*

**psychology**

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.
*Friday, October 29, 2010 at 1:10am 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.
*Thursday, June 2, 2011 at 12:25pm by PsyDAG*

**Stats...is this correct??**

Scores on the Stanford-Binet Intelligence scale have a mean of 100 and a standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile rank within the population? z = (68-100)/16 z = -32/16 = -2 So would it be ...
*Tuesday, October 18, 2011 at 9:54pm by Jen*

**algebra 2**

Range = highest value - lowest Mode = most frequently occurring score Median = 50th percentile. Half of the scores have a higher value and half are lower. Mean = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum ...
*Wednesday, May 23, 2012 at 11:55pm by PsyDAG*

**staticstics**

Use z-scores using sample size: z = (x - mean)/(sd/√n) Find two scores: z = (32 - 30)/(5.7/√31) z = (28 - 30)/(5.7/√31) Find the probability between the two z-scores using a z-table. Subtract that value from 1 for your answer. I hope this will help get you ...
*Wednesday, October 17, 2012 at 10:27am by MathGuru*

**statistics**

5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
*Friday, June 3, 2011 at 7:08pm by neil*

**Statistics**

SST = ∑X^2 - (∑X)^2/N ...where ∑X^2 = sum of squared scores and (∑X)^2 = square of the summed scores. N = total sample size. SSM = ∑A^2/n - (∑X)^2/N ...where A^2 = square of the sum of scores in each group and n = sample size per group. SSE...
*Tuesday, August 28, 2007 at 6:18pm by MathGuru*

**statistics**

For a particular population, a sample of n = 4 scores has an expected value of 10. For the same population, a sample of n = 25 scores would have an expected value of ____. a. 4 b. 8 c. 10 d. 20
*Wednesday, January 8, 2014 at 7:34pm by Lyndyc*

**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*

**statistics**

-A set of seven scores has a mean of 10. If one of the scores is changed from X=15 to X=1, what will be the new value for the new mean? -A sample of n=8 scores has a mean of M=12. One new score is added to the same and the new mean is found to be M=13. What is the vaule of the...
*Sunday, January 27, 2008 at 6:48pm by Joan*

**statistics**

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of the scores, a “B” grade to the next 10% of the ...
*Sunday, March 24, 2013 at 5:22pm by Sarah*

**Math**

to get an average of 9 on 9 scores, her total of all the scores must have been 81 So after the high and low are removed there were 7 scores for an average of 9.1 so that total must have been 9.1(7) = 63.7 so the sum of the two scores removes was 17.3
*Monday, December 13, 2010 at 8:22pm by Reiny*

**Math**

You will always have a range from 50-57. Just keep half of the scores above 54 and below 54 (median), and have the greatest number of scores valued at 56 (mode). You do not seem to be limited in terms of the number (n) of scores you can use within these restrictions. Changing ...
*Tuesday, February 3, 2009 at 10:50pm by PsyDAG*

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