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Your professor wanted to estimate the mean GPA of students. He collected a sample of students, recorded their GPA and constructed a confidence interval using

Your professor wanted to estimate the mean GPA of students. He collected a sample of students, recorded their GPA and constructed a confidence interval using the formula approach.His interval was (2.19,2.67).

What was the margin of error for this interval?

What sample mean GPA did Mr. Smith get?

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