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Question 1: Eight measurements were made on the inside diameter of forged piston rings used in...

Question 1:

Eight measurements were made on the inside diameter of forged piston rings used in an automobile engine. The data (in millimeters) are 74.001, 74.003, 74.015, 74.000, 74.005, 74.002, 74.005, and 74.004.

  1. Compute the sample mean and sample standard deviation of the temperature data.
  2. Graph a histogram of the data.
  3. Graph a normal probability plot of the data.
  4. Comment on the data.

Question 2:

The April 22, 1991 issue of Aviation Week and Space Technology reports that during Operation Desert Storm, U.S. Airforce F-117A pilots flew 1270 combat sorties for a total of 6905 hours. What is the mean duration of an F-117A mission during this operation? Why is the parameter you have calculated a population mean?

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