Sanjana M.

asked • 07/12/23

Double Checking So Can Someone tell me what the answer is

A calculus exam that was taken by 99 students is recorded and normally distributed. The mean score on the exam is 77 and the standard deviation is 2.6. What percent of the scores are in the 74.4 and 79.6 range?

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Bradford T. answered • 07/12/23

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MS in Electrical Engineering with 40+ years as an Engineer

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This is one standard deviation each side of the mean (74.4-79.6), so it would be twice 34.13 %.

It's best to look at the normal curve to get the percentages.

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Doug C.

And here is how you can check it out on Desmos: desmos.com/calculator/vxhfyupide
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07/12/23

Peter R.

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Error on link (or did I enter it wrong?)
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07/13/23

Bradford T.

desmos.com/calculator/vxhfyupide Worked for me....looks good
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07/13/23

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