Empirical rule between two scores
Test scores are Normal with mean and standard deviation . Using the 68–95–99.7 rule, approximately what percent of scores fall between and ? Give a number of percent to one decimal.
Show hints (2)+
- Convert both bounds to -scores first.
- Split the bell at the mean and use the 68/95 bands.
Answer
Reveal answer →Final answer
81.5 (± 0.5)
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