Question

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. For the study described above, how much of a difference would you expect between the sample mean and the population mean assuming that the null hypothesis is true?

A. 2.00

B. 0.00

C. 0.20

D. 1.65

E. 0.05

F. 0.06

Answer 1

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. a difference would expect between the sample mean and the population mean assuming that the null hypothesis is true =0.00

As expected difference between sample mean and population mean as null true=expected value of sample mean is population mean=0.00(ans)------B

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