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For a normal distribution, what percentage of values lies within two standard deviations of the mean? 99.7% 97% 68% 95% I think it is D, may someone please verify?

For a normal distribution, what percentage of values lies within two standard deviations of the mean? 99.7% 97% 68% 95% I think it is D, may someone please verify?
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4 votes
For a normal distribution, what percentage of values lies within two standard deviations of the mean?

99.7%



97%



68%



95%


I think it is D, may someone please verify?

User Justinas
by
8.5k points

1 Answer

6 votes
The answer is indeed D. If you check the normal distribution curve you get that within 1 standard diviation its
34%+34%=68%
Within 2 it's 34+34+13.5+13.5= 95%
And within 3 it's 34+34+13.5+13.5+2.5+2.5=100%
User Cotopaxi
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8.4k points
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