Mathematics, 24.06.2021 15:30 adamske0

The quiz grades of a math class are given. 81, 75, 68, 97, 69, 81, 89, 74, 75, 82, 91, 90 The grades are normally distributed with a mean of 81 and a standard deviation of 9. 2 What is the z-score of the lowest grade in the quiz?

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The quiz grades of a math class are given. 81, 75, 68, 97, 69, 81, 89, 74, 75, 82, 91, 90 The grades are normally distributed with a mean of 81 and a standard deviation of 9. 2 What is the z-score of the lowest grade in the quiz?​

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The quiz grades of a math class are given. 81, 75, 68, 97, 69, 81, 89, 74, 75, 82, 91, 90 The grades are normally distributed with a mean of 81 and a standard deviation of 9. 2 What is the z-score of the lowest grade in the quiz?