Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. suppose 188 students take the exam. about how many would receive a score above 80?

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Mathematics

Rodrigo Bond

2 November, 03:42

Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. suppose 188 students take the exam. about how many would receive a score above 80?

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Erica Bryant · Answer 1

By the empirical rule, 16% will receive a score below 80 (1 standard deviation below the mean). The other 84%, about 0.84*188 = 158, will receive a score above that value.

About 158 students would receive a score above 80.