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When Xochitl runs the 400 meter dash, her finishing times are normally distributedwith a mean of 84 seconds and a standard deviation of 2.5 seconds. Using theempirical rule, determine the interval of times that represents the middle 68% of herfinishing times in the 400 meter race.

Respuesta :

Recall the following for emperical rule.

Given a normally distributed data,

68% of the data lies within 1 standard deviation away from the mean.

95% of the data lies within 2 standard deviation away from the mean.

99.7% of the data lies within 3 standard deviation away from the mean.

Given a mean of 84 seconds, and a standard deviation of 2.5 seconds.

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