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joan’s finishing time for the Bolder Boulder 10K race was 1.82 standard deviations faster than the women’s average for her age group. There were 395 women who ran in her age group. Assuming a normal distribution, how many women ran faster than Joan? (Round down your answer to the nearest whole number.)

 Feb 21, 2022
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1.82 S.D.   corresponds to a Z-score of  .9656     (96.56 %)

 

 

women faster will be    (1 - .9656)  * 395   

 Feb 21, 2022

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