a random sample of 70 four-year-old attending day care center provided a yearly tuition average of $3,994 and a population standard deviation of $660....

a random sample of 70 four-year-old attending day care center provided a yearly tuition average of $3,994 and a population standard deviation of $660. Find the 93% confidence interval of the true mean. If a day care center were starting up and wanted to keep tuition low, what would be a reasonable amount to charge? Round your calculation to the nearest dollar