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------------------------------------------------ "A local pizza shop delivery time of 30 minutes and a standard deviation of 7 minutes. Use the 68-95-99.7 rule. What delivery of the percent takes less than 16 minutes" A. 68% B. 95% C. 99.7% D. 32%

According to this rule, approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

Determining the Delivery Percent

In this case, the mean delivery time is 30 minutes with a standard deviation of 7 minutes. To find the delivery percent that takes less than 16 minutes, we need to find how many standard deviations this value is away from the mean.

Z = (X - mean) / standard deviation

Plugging in the values, Z = (16 - 30) / 7 = -2.

Therefore, the delivery time of 16 minutes is 2 standard deviations below the mean. According to the 68-95-99.7 rule, approximately 95% of the data falls within two standard deviations. Hence, the answer is B. 95%.

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