CIMA BA2 · Chapter 9 · Question 11 of 11
For a normal distribution, approximately what proportion of values lie within ONE standard deviation either side of the mean?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: C) 68%
Explanation
For any normal distribution, about 68% of values lie within one standard deviation of the mean, about 95% within two standard deviations and about 99.7% within three. 50% of values lie on each side of the mean.
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