Testing: Ho: p=0.63 H₁: p < 0.63 Your sample consists of 98 subjects, with 58 successes. Calculate the test statistic, rounded to 2 decimal places 2

Fill in the missing values.   One-Sample T: X Test of mu=91 vs not = 91 Variable: X N: 25 Mean: 92.5805 StDev: ? SE Mean: 0.4673 95% CI: (91.6160, ?) T: 3.38 P: 0.002

Pick the Test (Z-test, Single Sample T-test, Independent Sample T-test, Paired Sample Ttest, ANOVA):   9. You are studying procrastination on your campus and find a measure with good norms for college students ( = 4.37; = .89). You test whether your sample mean on this measure is different from the general college population. Which of the following statistics would you use for your test? Test: ___________

Pick the Test (Z-test, Single Sample T-test, Independent Sample T-test, Paired Sample Ttest, ANOVA):   19. You are studying procrastination on your campus and find a measure with good norms for college students ( = 4.37; = .89). You test whether your sample mean on this measure is different from the general college population. Which of the following statistics would you use for your test? Test: _____________________

PROPORTIONS Sample Size: Calculate the sample size. A previous study showed that 69% of community college students have read a book for personal enjoyment during the school year. If a new study were to be done in order to reduce the margin of error to 1%, how many students should be sampled?

90%

Proportions On April 15th, 1912, the R.M.S. Titanic sank into the North Atlantic Ocean, resulting in the loss of more than 1,500 passengers and crew. Below is a table which summarizes the total number of passengers and the number of survivors for the crew, first-, second-, and third-class. Find the proportion of survivors by type of service (crew, first, second, third). Test the hypothesis at the 95% confidence level that the proportion of first-class survivors is the same as .50. What do you calculate for the test-statistic? What is the critical statistic? What is the conclusion of your hypothesis test?   Class Passengers Survived Crew 885 212 First 325 202 Second 285 118 Third 706 178 Total 2201 710

Claim: p = 30; a = 0.06; o = 3.25. Sample statistics: x= 28.9, n 73 Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) CA. The critical values are + 1.88 O B. The critical value is Determine the outcome and conclusion of the test Choose the correct answer below. A. Fail to reject Ho At the 6% significance level, there is not enough evidence to support the claim, O B. Reject H, At the 6% significance level, there is enough evidence to support the claim. O C. Reject H At the 6% significance level, there is enough evidence to reject the claim O D. Fail to reject H,. At the 6% significance level, there is not enough evidence to reject the claim

Send money When they send out their fundraising let-ter, a philanthropic organization typically gets a return from about 5% of the people on their mailing list. Tosee what the response rate might be for future appeals,they did a simulation using samples of size 20, 50, 100,and 200. For each sample size, they simulated 1000mailings with success rate p = 0.05 and constructedthe histogram of the 1000 sample proportions. Explainhow these four histograms demonstrate what the Central Limit Theorem says about the sampling distri-bution model for sample proportions. Be sure to talk about shape, center, and spread.

multiple choice