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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

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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 closely approximated by a normal curve. find the percent of times that are at least 14.3 seconds

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2021-08-28T18:35:38+00:00
2021-08-28T18:35:38+00:00 1 Answers
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## Answers ( )

Answer:The percent of times that are at least 14.3 seconds is approximately

16%.Step-by-step explanation:Let

Xdenote the time for running the 100-yard dash.It is provided that the times are very closely approximated by a normal curve.

So, the random variable

Xfollows a normal distribution with a mean time of 15.2 seconds and with a standard deviation of 0.9 seconds.Compute the probability of times that are at least 14.3 seconds as follows:

*Use a

z-table.Thus, the percent of times that are at least 14.3 seconds is approximately

16%.