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 s 2 = .0005. use = .05 to test whether the population variance specification is being violated.
state the null and alternative hypotheses.
h0 : σ2
ha : σ2
calculate the value of the test statistic (to 2 decimals).
the p-value is what is your conclusion?