Question

Asked Oct 21, 2019

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Running times for 400400 meters are Normally distributed for young men between 1818 and 3030 years of age, with a mean of 9393seconds and a standard deviation of 1616 seconds. Thus, 99.799.7 % of running times are approximately between:

Step 1

From the given information, the random variable *X* as the running times follows normal distribution with mean 93 seconds and the standard deviation is 16 seconds.

**Empirical Rule for normal distribution:**

- The percentage of values lies between one standard...

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