Statistics

? 2011 BFW Publishers The Practice of Statistics, 4/e- Chapter 9 431 Test 9A AP Statistics Name: Part 1: Multiple Choice. Circle the letter corresponding to the best answer. 1. In a test of H0: p = 0.7 against Ha: p z 0.7, a sample of size 80 produces z = 0.8 for the value of the test statistic. Which of the following is closest to the P-value of the test? (a) 0.2090 (b) 0.2119 (c) 0.4238 (d) 0.4681 (e) 0.7881 2. An opinion poll asks a simple random sample of 100 college seniors how they view their job prospects. In all, 53 say ?good.? Does the poll give convincing evidence to conclude that more than half of all seniors think their job prospects are good? If p = the proportion of all

PreTest 11A AP Statistics Name:KEY Directions: Work on these sheets. Tables and formulas appear on a separate sheet. Part 1: Multiple Choice. Circle the letter corresponding to the best answer

Chapter 10 Vocabulary Review: The following are some of the vocabulary words that you should know: Standard error Pooled (or combined) sample portion Randomization distribution Two-sample z statistic Two-sample t statistic Pooled estimator Pooled two-sample t statistic Chapter 10 Mathematical Content Review: The following are some of the mathematical pieces you should be able to do: Describe the characteristics of the sampling distribution of . Calculate probabilities using the sampling distribution of . Determine whether the conditions for performing inference are met. Construct and interpret a confidence interval to compare two proportions. Perform a significance test to compare two proportions. Interpret the results of inference procedures in a randomized experiment.