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10-12-2022
SAT

contestada

A random sample of 100 students had a mean grade point average (GPA) of 3.2 with a standard deviation of 0.2. Calculate an approximate 95% confidence interval for the mean GPA for all students. Note: Assume z-statistics at 95% confidence interval is 2. Report your answer as" ( X.XX - Y.YY) in 2 decimal points.

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