(Answered) An engineers union in columbus ohio claims that the average

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An engineers union in Columbus, Ohio claims that the average pay for women working in the auto industry is $16/hr. A simple random sample of 9 women working in 1998 as engineers in the automotive industry in Columbus, Ohio revealed that the average pay rate was $15/ hr with a standard deviation of $2.

(a) Find a 99% confidence interval on the true mean pay rate of women engineers.

(b) What can you say about the union's claim? Write a sentence or two.

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