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A random sample of 64 students at a university showed an average age of 25 years and a sample standard deviation of 2 years. To

A random sample of 64 students at a university showed an average age of 25 years and a sample standard deviation of 2 years. To construct a 98% confidence interval for the average age of all students in the university, the margin of erroris given by

a. 0.5

b. 0.5975

c. 0.25

d. 0.6171

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