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A lecturer wanted to estimate the mean test score of University of Aberdeen students in a maths test. A random sample of n=100 students is

A lecturer wanted to estimate the mean test score of University of Aberdeen students in a maths test. A random sample of n=100 students is selected, and their test scores are recorded. The scores are found to have an average of 15.52 and a standard deviation of 3.50. Assuming that the test scores are normally distributed, the 95% confidence interval for the mean test score from the exam is:

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