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test 9a 2

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Subject: 
Statistics
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Tags: 
Statistics
Statistical tests
Hypothesis testing
Statistical hypothesis testing
Z-test
Statistical power
Statistical significance
Normal distribution
Student's t-test
Sample size determination
P-value
F-test

? 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

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