# 1 Sample Inference Test (2).pdf - Test 9C AP Statistics...

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Test 9C AP Statistics Name: Part 1: Multiple Choice. Circle the letter corresponding to the best answer. Use the following for questions 1 and 2: Resting pulse rate is an important measure of the fitness of a person's cardiovascular system, with a lower rate indicative of greater fitness. The mean pulse rate for all adult males is approximately 72 beats per minute. A random sample of 25 male students currently enrolled in the Agriculture School at a major university was selected and the mean resting pulse rate was found to be 80 beats per minute with a standard deviation of 20 beats per minute. The experimenter wishes to test if the students are less fit, on average, than the general population. 1. The null and alternative hypotheses are (a) 0 : 72; : 72 a H H (b) 0 : 72; : 72 a H x H x (c) 0 : 80; : 72 a H H (d) 0 : 80; : 72 a H x H x (e) 0 : 72; : 72 a H H
2. Which of the following describes a Type II error in this setting?
3. A significance test was performed to test the null hypothesis H 0 : μ = 2 versus the alternative H a : μ 2. A sample of size 28 produced a test statistic is t = 2.051. Assuming all conditions for inference were met, which of the following intervals contains the P -value for this test?
© 2011 BFW Publishers The Practice of Statistics, 4/e- Chapter 9 441
442 The Practice of Statistics, 4/e- Chapter 9 © 2011 BFW Publishers