A Researcher Investigates the Effect of a New Drug on Resting

question 22

Multiple Choice

A researcher investigates the effect of a new drug on resting heart rate.The resting heart rates of 15 patients are measured before and after administration of the drug. The results are summarized in the table below. The question of interest is whether the resting heart rate increases after administration of the drug. Find the 95% confidence interval for the mean between population differences for heart rates.

• A)(-2.64, 13.64))
• B)(-3.64, 14.64)
• C)(-2.31.13.31)
• D)(-1.64, 12.64)

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