For a random sample of 400 students, the mean cost for textbooks during the first semester of college was found to be $368.75, and the sample standard deviation was $38.04. Assuming that the...

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Extracted text: For a random sample of 400 students, the mean cost for textbooks during the first semester of college was found to be $368.75, and the sample standard deviation was $38.04. Assuming that the population is normally distributed, find the margin of error of a 90% confidence interval for the population mean. The margin of error for a 90% confidence interval is (Round to two decimal places as needed.)