8. Let µ represent the population mean height of all adult American males between the ages of 18 and 21. You want to answer the question "Is the mean height for all adult American males between the ages of 18 and 21 now over 6 feet?" What are the appropriate null and alternative hypotheses to answer this question? A. Ho: X̄ = 6 vs. Ha: X̄ > 6 B. Ho: X̄ = 6 vs. Ha: X̄ ≠ 6 C. Ho: µ = 6 vs. Ha: µ > 6 D. Ho: µ > 6 vs. Ha: µ = 6
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8. Let µ represent the population mean height of all adult American males between the ages of 18 and 21. You want to answer the question "Is the mean height for all adult American males between the ages of 18 and 21 now over 6 feet?" What are the appropriate null and alternative hypotheses to answer this question?
A. Ho: X̄ = 6 vs. Ha: X̄ > 6
B. Ho: X̄ = 6 vs. Ha: X̄ ≠ 6
C. Ho: µ = 6 vs. Ha: µ > 6
D. Ho: µ > 6 vs. Ha: µ = 6
9. You were told that the 1st, 2nd, and 3rd
A. 25%
B. 50%
C. 75%
D. 90%
10. In an assembly line, two inspectors correctly detect defective items with probabilities 0.90 and 0.91 respectively. Assuming their evaluations are independent of each other, what is the probability that the two inspectors will BOTH correctly detect defective items?
A. 0.90(0.91)
B. 1 - 0.90(0.91)
C. (1 - 0.90)(1 - 0.91)
D. 1- (1 - 0.90)(1 - 0.91)
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