8.86 GPAs You want to estimate the difference in grade point averages between two groups of univer-...

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8.86 GPAs You want to estimate the difference in grade point averages between two groups of univer- sity students accurate to within 0.2 grade point, with probability approximately equal to 0.95. If the standard deviation of the grade point measurements is approxi- mately equal to 0.6, how many students must be included in each group? (Assume that the groups will be of equal size.)

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