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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 .0004. Suppose the sample variance for 30 parts turns out to be s² = .0005. Use α = .05 to test whether the population variance specification is being violated.

a. State the null and alternative hypotheses.

H₀: σ² =

H_a: σ² >

b. Calculate the value of the test statistic (to 2 decimals).

c. The p-value is

d. What is your conclusion?

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Category:- Statistics and Probability
Reference No.:- M9161953

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