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Mathematics, 03.12.2019 01:00 swaggg2084

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 505 and a standard deviation of 170. the grading process of this year's exam has just begun. the average score of the 35 exams graded so far is 530.what is the probability that a sample of 35 exams will have a mean score of 530 or more if the exam scores follow the same distribution as in the past?

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