An instrument maker has randomly selected and submitted 20 of its electronic blood- pressure measurement units to

Question:

An instrument maker has randomly selected and submitted 20 of its electronic blood- pressure measurement units to a medical laboratory for testing. At the lab, each unit measures the “blood pressure” of a testing device that simulates a human arm; within the device the pressure is a known constant. For the instruments submitted for testing, the standard deviation of the readings is 1.4 millimeters. Assuming a normal of measurement values, determine the 95% confidence interval for the population standard deviation of instruments produced by this manufacturer.
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...