# TEST 10 B WITH ANSWERS - Test 10B AP Statistics Name...

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Test 10B AP Statistics Name: Directions: Work on these sheets. Answer completely, but be concise. A normal probability table is attached. Part 1: Multiple Choice. Circle the letter corresponding to the best answer. 1. The value of z* required for a 70% confidence interval is (a) -0.5244 (b) 1.036 (c) 0.5244 (d) 0.6179 (e) The answer can’t be determined from the information given. (f) None of the above. The answer is _____________________. 2. A significance test allows you to reject a hypothesis H 0 in favor of an alternative H a at the 5% level of significance. What can you say about significance at the 1% level? (a) H 0 can be rejected at the 1% level of significance. (b) There is insufficient evidence to reject H 0 at the 1% level of significance. (c) There is sufficient evidence to accept H 0 at the 1% level of significance. (d) H a can be rejected at the 1% level of significance. (e) The answer can’t be determined from the information given. 3. A 95% confidence interval for the mean μ of a population is computed from a random sample and found to be 9 ± 3. We may conclude that (a) There is a 95% probability that is between 6 and 12. (b) There is a 95% probability that the true mean is 9 and a 95% chance the true margin of error is 3. (c) If we took many, many additional random samples and from each computed a 95% confidence interval for , approximately 95% of these intervals would contain . (d) If we took many, many additional random samples and from each computed a 95% confidence interval for , 95% of them would cover the values from 6 to 12. (e) All of the above.

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TEST 10 B WITH ANSWERS - Test 10B AP Statistics Name...

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