Question 1061671
z=(x-mean)/sd
Between 4 and 4.60 min is a z between 0 and 1.50, probability is 0.4332.
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Last more than 4.60 min is the difference between 0.5 and 0.4332.  That is 0.0668.
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Between 4.60 and 5.50 minutes is z between +1.50 and +3.75 or 0.0667,
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Between 3.50 and 5.50 minutes is z between -1.25 and +3.75 or 0.8943.
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 The 96th percentile is where z=+1.75
Multiply that by 0.40, the sd, and that is 0.70. Add that to the mean and the time is 4.70 min or 4m42s
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