Question

An automotive part must be machined to close tolerances to be acceptable to customers. Production specifications call for a maximum variance in the lengths of the parts of 0.0006. Suppose the sample variance for 40 parts turns out to be s² = 0.0007. Use α = 0.1 to test whether the population variance specification is being violated.

Select one:

a. Test statistic = 51.39, reject H₀

b. Test statistic = 51.39, can't reject H₀

c. Test statistic = 45.5, reject H₀

d. Test statistic = 45.5, can't reject H₀

Answer 1

Here answer is

d) Test statistics=45.5, can't reject H0