Question: A government agency wants to determine whether the average salaries of four various kinds of transportation operators differ. A random sample of five employees in each of the four categories yields the salary data given in the table below.
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a. Construct an ANOVA table and estimate the p -value .
b. Specify the competing hypotheses in order to determine whether the average salaries of the transportation operators differ.
c. At the 5% significance level, can we conclude that the average salaries of the four transportation operators differ?