The head of the English department is interested in the mean writing scores between freshman English students who are taught by two different teachers. The incoming freshmen are randomly assigned to one of the two English teachers and are given a standardized writing test after the first semester. We take a sample of 30 students from both teachers' classes. Are the mean test scores in Mrs. Jones' class higher than the mean of Mr. Smith's class? Which hypothesis statement is appropriate for this?
Added by Jennifer D.
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We want to compare the mean test scores of Mrs. Jones' class (let's call this mean $\mu_1$) and Mr. Smith's class (let's call this mean $\mu_2$). Show more…
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