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The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percentage of the scores are greater than 87? 34% 50% 84% 16%
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Aug 11, 2023
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The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percentage of the scores are greater than 87? 34% 50% 84% 16%
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Prule
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Given
The z-score formula is
In our case,
Using a z-score table,
Then,
Thus, the answer is 16%
Kamil Kamili
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Aug 16, 2023
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Kamil Kamili
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