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After reading an article about the benefits of acupuncture, a researcher decides to conduct an experiment...

After reading an article about the benefits of acupuncture, a researcher decides to conduct an experiment to determine if acupuncture has an effect on back pain. The researcher recruits 11 people with chronic back pain to participate in a study. Each participant rates his or her back pain prior to the acupuncture and following the acupuncture. Ratings are made on a 10-point scale with higher numbers indicating greater back pain. Test the researcher's assumption using an alpha level = .05, two tailed.

What is the verbal null hypothesis (H0) for this study?

a. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture will be greater than the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

b. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture is not different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

c. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture will be different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

d. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture will be lower than the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

What is the verbal research hypothesis (H1) for this study?

a. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture will be greater than the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

b. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture is different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

c. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture will be lower than the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

d. The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture is not different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

Math   Statistics-And-Probability   
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Answer #1

>> The verbal null hypothesis (H0) for this study is:

(b) The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture is different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

>> The verbal research hypothesis (H1) for this study is:

(b) The mean back pain ratings in the population of chronic back pain sufferers before receiving acupuncture is different from the mean back pain ratings in the population of of chronic back pain sufferers after receiving acupuncture.

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