Recent Homework Questions About Statistics
Find the indicated z score. The graph depicts the standard distribution with a mean 0 and standard deviation 1. 0.945 My answer is 1.6901 but I am not sure if it is correct.
Friday, November 8, 2013 at 8:52pm
A researcher performs a hypothesis test to test the claim that among girls aged 9-10, the mean score on a particular aptitude test differs from 72, which is the mean score for boys of the same age. Data were collected from a random sample of 43 girls aged 9-10 years and the 95...
Friday, November 8, 2013 at 7:21pm
A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 30 minutes. The owner has randomly ...
Friday, November 8, 2013 at 7:19pm
In creating a frequency distribution table, which of the following statement is not a basic rule to follow? a) Choose classes that cover the smallest and largest values. b) Make certain that each item can go into only one class. c) As a general rule, use between 10 and 15 ...
Friday, November 8, 2013 at 10:12am
When creating histograms, which is true statement? a) Form classes of equal width b) Alwyas form frequency groups that do not overlap c) Establish between five and 15 frequency groups d) All of the above.
Friday, November 8, 2013 at 10:09am
se2 = sqrt (SSE/n-2)) e = y-yhat e = 26.24-.18(22) =22.28 x. y. y hat e e^2 22. 15. 22.28. -7.28. 52.9984 11. 24. 24.26 -.26. 0.0676 7. 28. 24.98. 30.2. 9.1204 18. 28. 23. 5. 25 14. 33. 23.72. 9.28. 86.1184 8. 27. 24.8. 2.2. 4.84 22. 21. 22.28 -1.28. 1.6384 9. 30. 24.62. 5.38...
Thursday, November 7, 2013 at 11:06pm
a. z = (65-64.6)/(2.8/sqrt(1)) z = 0.14 b. z = (65-64.6)/(2.8/sqrt(49)) z = 1
Thursday, November 7, 2013 at 9:03pm
r = .8519 yhat = 0.411 + 1.216x
Thursday, November 7, 2013 at 8:47pm
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your previous post.
Thursday, November 7, 2013 at 11:13am
You draw nine cards from a standard deck of cards. What is the probability that a. four or more will be red, b. exactly two or three will be red, c. two or fewer will be red, and d. exactly five will be red?.
Thursday, November 7, 2013 at 8:30am
a nice calculator can be found at http://easycalculation.com/statistics/standard-deviation.php It will verify the answers which you have calculated on your own >wink wink<
Thursday, November 7, 2013 at 3:32am
Using a 0.05 level of significance, test the hypothesis that the probability of the NCAA Division I basketball champion being from the Pac 10 is 20%. Repeat the test for the hypothesis that the probability the champion is UCLA is 20%. What do these results say about testing ...
Thursday, November 7, 2013 at 2:49am
2E + 188 = 206 2E = 206-188 2E = 18 E = 9 Answer B
Wednesday, November 6, 2013 at 7:49pm
Thursday, October 31, 2013 at 2:12pm
When groups of data are separated, an association can get stronger because of a lurking variable. That lurking variable is usually the number of observations in the different groups of data.
Sunday, February 24, 2013 at 11:07pm