Test_10D - Test 10D AP Statistics Name: Directions: Work on...

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Test 10D AP Statistics Name: Directions: Work on these sheets. A Normal probability table and a t table will be provided. Part 1: Multiple Choice. Circle the letter corresponding to the best answer. 1. The heights (in inches) of males in the United States are believed to be Normally distributed with mean µ . The average height of a random sample of 25 American adult males is found to be x = 69.72 inches, and the standard deviation of the 25 heights is found to be s = 4.15. The standard error of x is (a) 0.17 (b) 0.69 ( c) 0.83 (d) 1.856 (e) 2.04 2. You want to estimate the mean SAT score for a population of students with a 90% confidence interval. Assume that the population standard deviation is σ = 100. If you want the margin of error to be approximately 10, you will need a sample size of (a) 16 (b) 271 (c) 38 (d) 1476 (e) None of the above. The answer is . 3. Which of the following is an example of a paired data design? (a) A teacher compares the pretest and posttest scores of students. (b) A teacher compares the scores of students using a computer-based method of instruction with the scores of other students using a traditional method of instruction. (c) A teacher compares the scores of students in her class on a standardized test with the national average score.
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Test_10D - Test 10D AP Statistics Name: Directions: Work on...

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