b. What is the power of the test if th a 10-point effect? 20. A researcher is investigating the effectiveness of a new medication for lowering blood pressure for individuals with systolic pressure greater than 140. For this population, systolic scores average u = 160 with a standard deviation of o = 20, and the scores 21 form a normal-shaped distribution. The researcher plans to select a sample of n = 25 individuals, and measure their systolic blood pressure after thev teke the medication for 60 days. If the researcher enes a two-tailed test with a = .05, a. What is the power of the test if the medication has a 5-point effect?

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244
CHAPTER 8 INTRODUCTION TO HYPOTHESIS TESTING
b. What is the power of the test if the medication has
20. A researcher is investigating the effectiveness of a
new medication for lowering blood pressure for
individuals with systolic pressure greater than 140.
For this population, systolic scores average u = 160
a 10-point effect?
21
with a standard deviation of o =
20, and the scores
form a normal-shaped distribution. The researcher
plans to select a sample of n =
measure their systolic blood pressure after they take
the medication for 60 days. If the researchher en0s a
two-tailed test with a = .05,
25 individuals, and
a. What is the power of the test if the medication has
a 5-point effect?
Transcribed Image Text:244 CHAPTER 8 INTRODUCTION TO HYPOTHESIS TESTING b. What is the power of the test if the medication has 20. A researcher is investigating the effectiveness of a new medication for lowering blood pressure for individuals with systolic pressure greater than 140. For this population, systolic scores average u = 160 a 10-point effect? 21 with a standard deviation of o = 20, and the scores form a normal-shaped distribution. The researcher plans to select a sample of n = measure their systolic blood pressure after they take the medication for 60 days. If the researchher en0s a two-tailed test with a = .05, 25 individuals, and a. What is the power of the test if the medication has a 5-point effect?
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