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The yearly tuition average for a random sample of 76 four-year-olds attending day-care centers was $3648. The standard deviation for all four-year-olds attending daycare was
The yearly tuition average for a random sample of 76 four-year-olds attending day-care centers was $3648. The standard deviation for all four-year-olds attending daycare was $630. Find the 90% confidence interval of the true mean. Is this a t-score problem or z-score problem? What is the critical value? What is the Margin of error? What is the 90% confidence interval
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