Con?dence interval for the variance of change

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Reference no: EM13963814

A drug is suspected of causing an elevated heart rate in a certain group of high-risk patients. Twenty patients from the group were given the drug. The changes in heart rates were found to be as follows.

-1 8 5 10 2 12 7 9 1 3
4 6 4 12 11 2 -1 10 2 8

Construct a 95% con?dence interval for the variance of change in heart rate. Assume that the population has a normal distribution and interpret.

Reference no: EM13963814

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