A drug is suspected of causing an elevated heart rate in a certain group of high-risk patients.

Question:

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.

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

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...