If sample size is large enough (30) and if data is normally distributed then:

Question

If sample size is large enough (>30) and if data is normally distributed then:

Answer

70% of "normal" individuals will fall within the mean ± 2 x SD

Answer

95% of "normal" individuals will fall within the mean  ± 2 x SD

Answer

90% of "normal" individuals will fall within the mean ± 1 x SD

Answer

95% of "normal" individuals will fall within the mean ± 1 x SD

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