Question

In a recent study, 5 Japanese and 6 U.S. plants that manufacture air conditioners were sampled and their turnover rates determined. The Japanese plants had a mean turnover of 3.12 percent with a standard deviation of 1.23 percent. The U.S. plants had a mean turnover of 6.30 percent with a standard deviation of 1.26 percent. Use this data and test whether there is a population difference in percent turnover between Japanese and U.S. air conditioning manufacturers.

A) State the null and alternative hypotheses

B) There are _______ degrees of freedom for this test

C) Find the critical value(s)

D) The pooled variance is __

E) The computed t statistics is _

F) What is your decision and conclusion? Provide a rationale

Answer 1