Average score on the exam for all test takers

Reference no: EM131870273

Suppose that scores on a standardized exam are normally distributed. To estimate the average score on the exam for all test takers, a researcher obtains a random sample of 25 scores. The sample yielded x = 480 and s = 75. Give a 95% confidence interval for the average score on the exam for all test takers.

Reference no: EM131870273

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