labarbie2796 labarbie2796

11-02-2020
Mathematics

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The grade-point average in an econometrics examination was normally distributed with a mean of 75. In a sample of 10 percent of students it was found that the grade-point average was greater than 80. Can you tell what the s.d. of the grade-point average was?

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fahadisahadam fahadisahadam

12-02-2020

To solve a standard deviation we require a specific result for each data. So this question(data from question) can not be enough to solve standard deviation.

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