Question: A random sample of 1,562 undergraduates enrolled in marketing courses was asked to respond on a scale from one (strongly disagree) to seven (strongly agree) to the statement: "Most advertising insults the intelligence of the average consumer". The sample mean response was 3.81 and the standard deviation was 1.57. Find a 95% confidence interval for the population mean response. Given that n is large it is not necessary to assume that the distribution of responses is normal but, would it be correct to assume normality in this case?

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