Construct a 90% confidence interval for the population mean. Assume the population has a normal distribution. A sample of 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation of 0.78. O (2.43, 3.29) O (2.5, 3.2) O (-0.52, 2.08) O (-0.8, 2.4)

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