Question

A government contractor is required to produce a part that has a mean service life greater than 2000 hours. a. What would the hypothesis be if the government was trying to prove that the mean service life was actuallv less than 2000 hours? b. What would the hypothesis be if the contractor needed to prove that it was meeting the requirement?

Answer 1

SolutionA:

null hypothesis

H0:

Alternative Hypothesis:

Ha: $\mu >2000$

we need to prove null hypothesis to support government that the mean service life was actually less than 2000 hours.

Solutionb:

Null hypothesis

H0: $\mu \leq 2000$

Alternative Hypothesis:

Ha: $\mu > 2000$

we meed to prove alternative hypothesis that it was meeting the requirement