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Intro to Stat_Part_49

# Intro to Stat_Part_49 - 161 Left-handed Sample size Sample...

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161 Left-handed Right-handed Sample size 41 41 Sample mean 97.5 98.1 Sample standard deviation 17.5 19.2 Table 10.7 A. Two independent means, normal distribution B. Two independent means, student-t distribution C. Matched or paired samples, student-t distribution D. Two population proportions, normal distribution For questions Exercise 10.42 – Exercise 10.43, use the following information. An experiment is conducted to show that blood pressure can be consciously reduced in people trained in a “biofeedback exercise program.” Six (6) subjects were randomly selected and the blood pressure measure- ments were recorded before and after the training. The difference between blood pressures was calculated ( after - before ) producing the following results: x d = - 10.2 s d = 8.4. Using the data, test the hypothesis that the blood pressure has decreased after the training, Exercise 10.42 (Solution on p. 167.) The distribution for the test is A. t 5 B. t 6 C. N ( - 10.2, 8.4 ) D. N - 10.2, 8.4 6 Exercise 10.43 (Solution on p. 167.) If α = 0.05, the p -value and the conclusion are A. 0.0014; the blood pressure decreased after the training B. 0.0014; the blood pressure increased after the training C. 0.0155; the blood pressure decreased after the training D. 0.0155; the blood pressure increased after the training For questions Exercise 10.44– Exercise 10.45, use the following information. The Eastern and Western Major League Soccer conferences have a new Reserve Division that allows new players to develop their skills. As of May 25, 2005, the Reserve Division teams scored the following number of goals for 2005.

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