If the distribution is normal:
Then, 68 % of the observations = (70)(0.68) = 47.6 = 47 observations lie within 1 standard deviation of the mean.
23 observations do not lie within one standard deviation of the mean.
If the distribution is not normal, we cannot answer this question.
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If the distribution is normal:
Then, 68 % of the observations = (70)(0.68) = 47.6 = 47 observations lie within 1 standard deviation of the mean.
23 observations do not lie within one standard deviation of the mean.
If the distribution is not normal, we cannot answer this question.