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 3 parts turns out to be S2 = .0005. Use a=.05 to test whether the population variance specification is being violated.
Five-step Hypothesis Testing Procedure -
(1) State the hypothesis
H0: Population variance specification not is being violated, that is s^2 <= 0.0004
Ha: Population variance specification is being violated, that ...
Neat, step-by-step solution is provided.