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April 19, 2014

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

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Business Statistics
28.5, 44.5
Saturday, March 29, 2014 at 11:06am

Statistics
These are the answers that I get to chose from. A. 0.7433. B. 0.8643. C. 0.1357. D. 0.
Saturday, March 29, 2014 at 10:02am

Statistics
X = 100 + 15(.33) = 105.0
Friday, March 28, 2014 at 3:35pm

Statistics
you can do lots of Z table stuff here: http://davidmlane.com/hyperstat/z_table.​html
Friday, March 28, 2014 at 3:20pm

Statistics
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.
Friday, March 28, 2014 at 3:09pm

Statistics
Thank you
Friday, March 28, 2014 at 12:01am

Statistics
mean = (4,253+ 5,578 +6,406+ 7,334+ 8,728 + 11,298 +15,182)/ 7
Thursday, March 27, 2014 at 11:54pm

Statistics
For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,253; 5,578; 6,406; 7,334; 8,728; 11,298; 15,182. What is the annual arithmetic mean number of degrees awarded? About 9,120 ...
Thursday, March 27, 2014 at 11:50pm

Statistics
About 8,397
Thursday, March 27, 2014 at 11:49pm

Statistics
Thank you! That is a lot of help!!
Thursday, March 27, 2014 at 11:46pm

Statistics
IQ = Q3 - Q1 IQR = 72-25 = 47
Thursday, March 27, 2014 at 11:45pm

Statistics
8.Using the following statistics to describe a distribution of data, what is the interquartile range? Minimum = 13 Q1 = 25 Median = 54 Q3 = 72 Maximum = 98 25. 12. 85. 47.
Thursday, March 27, 2014 at 11:26pm

Statistics
For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,253; 5,578; 6,406; 7,334; 8,728; 11,298; 15,182. What is the annual arithmetic mean number of degrees awarded? About 9,120 ...
Thursday, March 27, 2014 at 10:11pm

Statistics
Thank you so much!!!
Thursday, March 27, 2014 at 10:11pm

Statistics
(50*100 + 100*27.20+ 20*12.20)/(50+ 100+20) = $7964/170 = $46.85
Thursday, March 27, 2014 at 9:58pm

Economics and Statistics
(50*100 + 100*27.20+ 20*12.20)/(50+ 100+20) = $7964/170 = $46.85
Thursday, March 27, 2014 at 9:55pm

Statistics
Thanks again!!
Thursday, March 27, 2014 at 9:49pm

Statistics
A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum preferred at $100 a share • 100 shares of GTE preferred at $27.20 a share • 20 shares of Boston Edison preferred at $12.20 a share What is the weighted arithmetic mean price ...
Thursday, March 27, 2014 at 9:49pm

Statistics
(11.0-2.0, 11.0+ 2.0) (9.0 , 13.0) 9.0 and 13.0 inches
Thursday, March 27, 2014 at 9:42pm

Statistics
The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 11.0 inches, and the standard deviation is 2.0 inches. About 68 percent of the outside diameters lie between what two amounts? 8....
Thursday, March 27, 2014 at 9:10pm

Statistics
Thank you
Thursday, March 27, 2014 at 9:08pm

Statistics
Range= highest value -lowest value Range = $145 - $132 = $13
Thursday, March 27, 2014 at 9:02pm

Economics and Statistics
(50*100 + 100*27.20+ 20*12.20)/(50+ 100+20) = $7964/170 = $46.85
Thursday, March 27, 2014 at 8:59pm

statistics
An airline company is considering a new policy of booking as many as 161 persons on an airplane that can seat only 140. (Past studies have revealed that only 81% of the booked passengers actually arrive for the flight.) Estimate the probability that if the company books 161 ...
Thursday, March 27, 2014 at 8:51pm

Statistics
The following are the weekly amounts of welfare payments made by the federal government to a sample of six families: $143, $138, $132, $136, $145 and $136. What is the range? $24 $9 $13 $0
Thursday, March 27, 2014 at 8:49pm

Economics and Statistics
A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum preferred at $100 a share • 100 shares of GTE preferred at $27.20 a share • 20 shares of Boston Edison preferred at $12.20 a share What is the weighted arithmetic mean price ...
Thursday, March 27, 2014 at 8:07pm

Statistics
Use a formula to find sample size. Here is one: n = [(z-value * sd)/E]^2 ...where n = sample size, z-value = 1.96 for 95% confidence, sd = 15.2, E = 3.5, ^2 means squared, and * means to multiply. Plug the values into the formula and finish the calculations. Round your answers...
Thursday, March 27, 2014 at 6:14pm

Business Statistics
First, arrange them in numerical order. 27, 29, 29, 41, 49, 59, 64, 79 The median number is the one in the middle. Since this set has two middle numbers (41, 49), the median is the average of those two numbers: 45
Thursday, March 27, 2014 at 5:23pm

Business Statistics
What is the median of 29, 49, 27, 64, 79, 59, 29 and 41? 29.0 45.0 59.5 49.0
Thursday, March 27, 2014 at 5:02pm

statistics
help
Thursday, March 27, 2014 at 2:10pm

probability and statistics
xvxc
Thursday, March 27, 2014 at 12:25pm

statistics
9 people probability of man first = 5/9 then prob of woman = 4/8 so 20/72 for man then woman then probability of woman first = 4/9 then prob of man = 5/8 so 20/72 again add them 40/72 = .55
Thursday, March 27, 2014 at 11:27am

statistics
A committee consists of five men and four women. Two people are selected at random from the committee. What is the probability that one man and one woman will be selected?
Thursday, March 27, 2014 at 11:13am

statistics
345
Thursday, March 27, 2014 at 9:38am

statistics
Not Sure
Thursday, March 27, 2014 at 3:08am

statistics
64
Wednesday, March 26, 2014 at 11:14pm

Statistics
A population has a standard deviation of 15.2. How large a sample must be drawn so that a 95% confidence interval for the population mean will have a margin error equal to 3.5?
Wednesday, March 26, 2014 at 9:37pm

`Statistics
A public relations firm found only 9% of voters in a certain state are satisfied with their US senators. How large a sample of voters should be drawn so that the sample proportion of voters who are satisfied with their senators is approximately normally distributed?
Wednesday, March 26, 2014 at 9:36pm

Statistics
kjjn
Wednesday, March 26, 2014 at 9:15pm

Statistics
4
Wednesday, March 26, 2014 at 9:12pm

statistics
1
Wednesday, March 26, 2014 at 6:56pm

statistics
18 + 24 = 42 first black sock = 24/42 second black sock = 23/41 product = 24/42 * 23/41 = .321
Wednesday, March 26, 2014 at 6:07pm

statistics
If there are 18 blue socks and 24 black socks what is the probability of pulling out 2 black socks?
Wednesday, March 26, 2014 at 5:39pm

statistics
.4987 .4988
Tuesday, March 25, 2014 at 11:56pm

Business Statistics
10
Tuesday, March 25, 2014 at 11:06pm

Statistics
you can play around with Z table stuff here: http://davidmlane.com/hyperstat/z_table.​html
Tuesday, March 25, 2014 at 11:36am

statistics??
.
Tuesday, March 25, 2014 at 7:52am

Statistics
2.0285
Monday, March 24, 2014 at 10:11pm

Math-Statistics
Assume you build a Candy castle for which you buy a bag of gummy bears, a block of chocolate and a bag of nuts. The weight of the three ingredients is a random variable (X1, X2 and X3) with mean weights μ1 = 200 gram, μ2 = 400 gram and μ3 = 150 gram. The bags ...
Monday, March 24, 2014 at 7:26pm

Math-Statistics
The chance that a college student has a job offer before graduation is 70%. If I sample 200 graduates… (use continuity correction) a) what is the chance more than 130 of them have a job offer? b) what is the chance less than 133 of them have a job offer? c) what is the ...
Monday, March 24, 2014 at 7:25pm

Math-Statistics
5) You know that you will inherit 20% of your uncle John’s wealth, 30% of your aunt Becky’s wealth and 50% of your parent’s wealth. Since they are not dead yet, their respective wealth is a RV and all we know is that their wealth at death is ~N and independent ...
Monday, March 24, 2014 at 7:25pm

Math-Statistics
Assume your expected lifetime income is $1.5 million and the standard deviation is $250,000. a) What is the chance that you will earn more than $1.1 million during your lifetime? b) What is the chance that you will earn less than $2 million during your lifetime? c) What is the...
Monday, March 24, 2014 at 7:23pm

statistics
0.028
Monday, March 24, 2014 at 2:32pm

stats
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.15) and its Z score. Insert all values in above equation to calculate the score.
Monday, March 24, 2014 at 1:20pm

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 95% = mean ± ...
Monday, March 24, 2014 at 1:18pm

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.10) and its Z score. Insert ±Z into equation above and solve for score.
Monday, March 24, 2014 at 1:13pm

Speech- Statistic needed
Try these. http://www.google.com/webhp?source=searc​h_app#q=u.s.+volunteers+disaster+relief+​+statistics
Monday, March 24, 2014 at 12:22pm

Speech- Statistic needed
Does anyone know of any websites that have statistics on the number of people that volunteer for disaster relief in the us?
Monday, March 24, 2014 at 12:13pm

statistics
help i do not understand how to solve this question: assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10 percent. What would be ...
Monday, March 24, 2014 at 11:31am

Statistics
Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to construct a 95% ...
Monday, March 24, 2014 at 8:34am

college statistics
Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to construct a 95% ...
Monday, March 24, 2014 at 8:33am

statistics
the central 80% of the Z table lies within µ ± 1.282σ So, plug in your numbers You can play around with Z table stuff at this excellent site: http://davidmlane.com/hyperstat/z_table.​html
Monday, March 24, 2014 at 5:09am

statistics
assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10 percent. What would be the upper and lower readings to qualify people to ...
Monday, March 24, 2014 at 2:59am

statistics
You do not mention what is being measured. Do the numbers represent SAT Scores or the number of people who took the test (participation rates)? Points on a scatter diagram are each represented by two numbers, one on the ordinate (Y axis) and the other on the abscissa (X axis...
Sunday, March 23, 2014 at 10:03pm

statistics
a. SE = 50/sqrt(15000) * sqrt((60000-15000)/60000-1))
Sunday, March 23, 2014 at 7:02pm

Statistics
The following is a list of 13 measurements: -38,-89,-47,-43,-70,59,92,97,23,-11,-62,​-22,-5. Suppose that these measurements are respectively labeled X1,X2,...,X13 Find the sum when i=1 Xi/30.
Sunday, March 23, 2014 at 6:55pm

Statistics
a. 25.4 -+ 1.96 * 2.4 /sqrt((90)) b. 25.4 -+ 1.645 * 2.4 /sqrt((90)) c. 25.4 -+ 2.575 * 2.4 /sqrt((90))
Sunday, March 23, 2014 at 6:40pm

statistics
2,3,4,5
Sunday, March 23, 2014 at 1:26pm

statistics
the answer is wrong...
Sunday, March 23, 2014 at 12:28pm

Statistics
99% = µ±2.576 std
Sunday, March 23, 2014 at 11:56am

statistics
2, 3
Sunday, March 23, 2014 at 10:14am

Statistics
)The random sample shown below was selected from a normal distribution Complete parts (a) and (b). Construct a 99% confidence interval for the population mean u. Round to two decimal places as needed.
Sunday, March 23, 2014 at 9:34am

Statistics
A random sample of 90 observations produced a mean that = 25.9 and a standard deviation s =2.4 (a)Find a 95% confidence interval for u (b)Find a 90% confidence interval for u (c)Find a 99% confidence interval for u (Use integers or decimals for any number in the expression. ...
Sunday, March 23, 2014 at 9:30am

statistics
(12) Suppose N – 60,000, n =15,000, and s =50 (a) compute the standard error of mean (x) using the finite population correction factor (b) Repeat part a assuming n =30,000 (c)Repeat part a assuming n = 60,000 (d)Compare parts (a), (b), and (c), and describe what happens ...
Sunday, March 23, 2014 at 9:25am

statistics
5. Suppose a manufacturer of computer chips is experiencing an average of 2% defective chips. (a) If a lot contains 1000 chips, what is the probability that more than 25 chips are defective? HINT. Use the normal approximation to the binomial.
Sunday, March 23, 2014 at 12:35am

statistics
The highest point in the scatter is the point for Illinois, at 1807. The two just below it, at 1778 and 1777, are for Minnesota and Iowa. The lowest points are at 1391 and 1385, for Maine and D.C. respectively. Pick all the options that are correct. The scatter diagram shows ...
Saturday, March 22, 2014 at 3:47pm

statistics
opinion polls find that 16 percent of americans adults claim that they never have time to relax. suppose you take a random sample of 400 american adults and count the number X in your sample and claim that they never never have time to relax.
Saturday, March 22, 2014 at 12:02pm

statistics
Z = (x -26)/2.4 1.55 = (x-26)/2.4 1.55(2.4) = x -26 1.55(2.4) + 26 = x
Friday, March 21, 2014 at 11:07pm

statistics
z = (98.5-98.6)/.74/sqr(100) z = (98.7- 98.6)/.74/sqr(100)
Friday, March 21, 2014 at 10:46pm

statistics
(20 C 10) (.45)^10 * (.55)^10
Friday, March 21, 2014 at 10:42pm

statistics
Consider a binomial experiment with 20 trials and a probability of 0.45 on a single trial.Use the normal distribution to find the probability of exactly 10 successes.
Friday, March 21, 2014 at 10:18pm

statistics
Suppose the average body temp is 98.6 assume the variable is normally distributed with a standard deviation of .74 degrees. suppose a sample of 100 is taken. what is the probability that the mean is below 98.4??? Between 98.5 AND 98.7??
Friday, March 21, 2014 at 7:28pm

statistics
the average act score submitted to a certain university is 26. to be eligible for admission, a student must score in the top 6% of applicants. if the scores are normally distributed with a standard deviation of 2.4, what is the minimum score needed to be considered for admission?
Friday, March 21, 2014 at 7:25pm

Statistics
Find the means 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 Z = (mean1 - mean2)/...
Friday, March 21, 2014 at 1:35pm

Statistics
An instructor hy pothesizes that the mean of the final ex am grades in her statistics class is larger for the male students than that it is for the female students. The data from the final ex am for the last semester are presented here. Test her claim using  = 0.05. ...
Friday, March 21, 2014 at 8:27am

Statistics
0.833 grams per mm is correct: slope=rsd(y)/sd(x)=0.75*0.5/0.45 slope is 0.8333 grams per mm The intercept of the regression line for estimating chick weight based on egg diameter is Intercept=mean y - slope *mean x Intercept = 23 - 0.8333* 6 = 18
Friday, March 21, 2014 at 6:09am

statistics
Standard deviation = √npq = √[(400)(.5)(.5)] = √(100) = 10 Note: n = sample size, p = .5, q = .5
Thursday, March 20, 2014 at 5:39pm

Math: Statistics Least squares line
Your least squares line looks okay. Now, to find the ?, use 7 for y in the equation and solve for x. That will be the value you seek. Here's how the equation would look: 7 = .01764x + .00693 I hope this helps.
Thursday, March 20, 2014 at 5:31pm

statistics
Here's one way to do this problem: n = 8 p = .80 q = 1 - p = 1 - .80 = .20 You will need to find P(7) and P(8). Add those values together, then subtract from 1. This will be your probability. You can use a binomial probability table, or calculate by hand using the ...
Thursday, March 20, 2014 at 5:21pm

Statistics
1. A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows: Eating Habits Scores Baseball Players Football Players Basketball Players 34 27 35 18 28 ...
Thursday, March 20, 2014 at 4:20pm

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.071) and its Z score. OR… http://davidmlane.com/hyperstat/z_table.​html
Thursday, March 20, 2014 at 1:32pm

statistics
From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.
Thursday, March 20, 2014 at 11:57am

Math: Statistics Least squares line
Find an equation of the least squares line, then use it to complete the table. X- 111 169 230 287 335 ? Y- 2 3 4 5 6 7 Extrapolation I missed the lesson on this and as far as I can tell I think the least squares line is y= .01764x+ .oo693 If anyone could verify my line and and...
Wednesday, March 19, 2014 at 11:59pm

statistics
If boys and girls are equally likely and groups 400 births are randomly selected find the standard deviation
Wednesday, March 19, 2014 at 11:19pm

statistics
Find z such that 7.1% of the standard normal curve lies to the left of z ?
Wednesday, March 19, 2014 at 10:47pm

Statistics
2
Wednesday, March 19, 2014 at 8:29pm

Statistics
(52!)/(5!47!) or 52C5 = 2,598,960 different ways a 5-card hand can be dealt from a deck of 52 cards. (4C1)x(48C4) = the amount containing at most one ace. (5C4)x(47C1) = amount containing cards of all four suits. (not very sure of this answer)
Wednesday, March 19, 2014 at 3:40pm

Statistics PLEASE HELP FINAL IN 1 HOUR
Is a new hair shampoo product actually effective? Ask participants to grade themselves on scale of 1-10 how attractive their hair is both before and after using a shampoo product after 2 weeks Results Subject Initial Rating (A) Rating After 2 Weeks (B) 1 1 5 2 2 3 3 5 5 4 3 7 ...
Wednesday, March 19, 2014 at 2:24pm

statistics
99% of men scored between -52.68 ,64.64 where did 95% of the values for weight relative to the ideal lie?
Wednesday, March 19, 2014 at 1:43pm

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n I'll let you do the calculations.
Wednesday, March 19, 2014 at 1:20pm

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