Refer to Exercise 16.11. Use all the sample information to find a 95% tolerance interval for 90% of the firing pin lengths. Assume the distribution of pin lengths is approximately normal.

Data from Exercise 16.11

A corporation that manufactures field rifles for the Department of Defense operates a production line that turns out finished firing pins. To monitor the process, an inspector randomly selects five firing pins from the production line, measures their lengths (in inches),and repeats this process at 30-minute intervals over a 5-hour period.

Transcribed Image Text:

FIREPINS 30-Minute Interval Firing Pin Lengths 1 1.05 1.03 .99 1.00 1.03 2 93 96 1.01 .98 .97 3 1.02 99 .99 1.00 .98 .98 1.01 1.02 .99 .97 5 1.02 .99 1.04 1.07 .98 6 1.05 .98 .96 91 1.02 7 .92 95 1.00 .99 1.01 8. 1.06 98 .98 1.04 1.00 9 97 99 99 .98 1.01 10 1.00 .96 1.02 1.03 .99