# I'm not understanding how the textbook came up with this answer:Question: Under what circumstances would a score that is 15 points above the mean be considered an extreme score?a. When the mean is much larger than 15b. When the standard deviation is much larger than 15c. When the mean is much smaller than 15d. When the standard deviation is much smaller than 15. I knonw the answer is "d" but I would like to understand why.

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I'm not understanding how the textbook came up with this answer:

Question: Under what circumstances would a score that is 15 points above the mean be considered an extreme score?

a. When the mean is much larger than 15

b. When the standard deviation is much larger than 15

c. When the mean is much smaller than 15

d. When the standard deviation is much smaller than 15.

I knonw the answer is "d" but I would like to understand why.

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Step 1

It is given that the when the standard deviation is much smaller than 15 the...

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