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A distribution of statistics exam scores has a population mean of 78 and a standard deviation of 6. Test the hypothesis that a statistics tutoring

A distribution of statistics exam scores has a population mean of 78 and a standard deviation of 6. Test the hypothesis that a statistics tutoring computer program would increase exam scores if you measured 27 stats students and obtained a mean of 80. Use an alpha value of .05, directional What is the value of zcrit

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