PRC-2 · Chapter 11 · Question 50 of 60
In a standard Normal Distribution, exactly what percentage of the data observations fall within ±1 standard deviation of the mean?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) 68.27%
Explanation
According to the Empirical Rule, roughly 68.27% of all observations in a perfectly bell-shaped normal distribution fall within one standard deviation of the arithmetic mean.
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