1. Mark wanted to demonstrate that a new intervention program is more efficient

Question

1. Mark wanted to demonstrate that a new intervention program is more efficient than the old one. He should conduct a one-tailed hypothesis test. True or False? Why?

2. For the same sample data with X¯ = 1, the p-value calculated under H0 : µ = 0 is twice as much as the p-value calculated under H0 : µ 0. True or False? Why?

3. We should always perform one-tailed tests because they produce smaller p-values. True or False? Why?

4. When testing H0 : µ 1, H0 is rejected if the observed Z score, i.e., the Z score of the sample mean X¯ with respect to the sampling distribution of the mean under µ = 1, is less than the critical Z score, i.e., Zcrit. True or False? Why?

5. The following two statements are equivalent: a) the observed Z score of the mean falls in the region of rejection, and b) the p-value is greater than the level of significance . True or False? Why?

Explanation / Answer

3. We should always perform one-tailed tests because they produce smaller p-values. True.

5.No, the two statements are different.

If the observed Z score of the mean falls in the region of rejection means reject the null.

b) the p-value is greater than the level of significance means fail to reject the null.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.