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at one high school the mean time for running the 100-yard dash is 15.2 seconds with a standard deviation of 0.9 seconds. The times are very close approximated by a normal curve. Find the percent of times that are:
between 15.2 and 16.1 seconds

  • math - ,

    I suggest you learn how to use (Broken Link Removed) or tables of the Gaussian error funtion.

    The answer that I get using the computational tool at that site is 34.1%

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