Question

A machine produces metal rods used in an automobile
suspension system. A random sample of 15 rods is selected,
and the diameter is measured. The resulting data (in millimeters)
are as follows:
8.24 8.25 8.20 8.23 8.24
8.21 8.26 8.26 8.20 8.25
8.23 8.23 8.19 8.28 8.24

1. calculate a 95% two-sided prediction interval. Round your answer to three significant digits.

2. calculate a two-sided tolerance interval that has a 95% confidence level with a 90% probability of coverage. For this answer, just enter only the upper limit of the tolerance interval into the box. Round your answer to three significant digits.

Answer 1