WebWork Update

This is an update regarding Assignment 16, problem 2c.  This problem asks some variation of the question “what percentage… fall within 1 (or 2, or 3) standard deviations of the mean?”  We learned the 68-95-99.7 rule, which is fine in general, BUT webwork is picky and wants more decimal points of accuracy than this rule provides.  So here are the correct answers, to two decimal places:

“within 1 standard deviation of the mean”:  ANSWER 68.27%

“within 2 standard deviations of the mean”: ANSWER 95.45%

“within 3 standard deviations of the mean”: ANSWER 99.73% 

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One Response to WebWork Update

  1. Tash J. says:

    Thank you that worked.

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