Question

A type of thread is being studied for its tensile strength properties. Fifty pieces were tested under similar conditions, and the results showed an average tensile strength of 78.3 kilograms and a standard deviation of 5.6 kilograms. Assuming a normal distribution of tensile strengths, give a lower 95% prediction limit on a single observed tensile strength value. In addition, give a lower 95% tolerance limit that is exceeded by 99% of the tensile strength values.

Answer 1

Answer: The upper prediction limit = 68.815 and the upper tolerance limit = 62.2672

Explanation:

The 5 attachments below sequentially and clearly explains this (from the left to the right)