A medical researcher believes that a drug changes the body's temperature. Seven test subjects are randomly selected and

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A medical researcher believes that a drug changes the body's
temperature. Seven test subjects are randomly selected and the body
temperature of each is measured. The subjects are then given the
drug, and after 3030 minutes, the body temperature of each is
measured again. The results are listed in the table below. Is there
enough evidence to conclude that the drug changes the body's
temperature?
Let
d=(body temperature after taking drug)−(body temperature before taking drug)d=(body temperature after taking drug)−(body temperature before taking drug).
Use a significance level of α=0.02α=0.02 for the test. Assume that
the body temperatures are normally distributed for the population
of people both before and after taking the drug.
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Step 1 of 5 :
Step 2 of 5 :
Find the value of the standard deviation of the paired
differences. Round your answer to two decimal places.