Mean Grade-Point Average Assume that all grade-point averages are to be standardized on a scale between 0
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Mean Grade-Point Average Assume that all grade-point averages are to be standardized on a scale between 0 and 4.
How many grade-point averages must be obtained so that the sample mean is within 0.01 of the population mean? Assume that a 95% confidence level is desired.
If we use the range rule of thumb, we can estimate s to be range>4 = 14 - 02>4 = 1.
Does the sample size seem practical?
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