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What is the probability that a sample of 40 exams

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Reference no: EM132843538

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 510 and a standard deviation of ITS. The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 490. What is the probability that a sample of 40 exams will have a mean score of 490 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.

Reference no: EM132843538

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