Determine the sample size needed to construct a 90% confidence interval to estimate the average gpa for the student population at a college with a margin of error equal to 0.5. assume the standard deviation of the gpa for the student population is 1.5.

24

Step-by-step explanation:

The formula to calculate the sample size is given by :-

Given : Margin of error :

The significance level :

Critical value :

Standard deviation :

Now, the required sample size will be :-

Hence, the required sample size = 24

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step-by-step explanation:

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