The typical amount of sleep per night for college students has a bell-shaped distribution with a mean of 7 hours and a standard deviation equal to 1.7 hours. Use the Empirical Rule to complete each sentence: About 68% of college students typically sleep between __ and __ hours per night. About 95% of college students typically sleep between __ and __ hours per night. About 99.7% of college students typically sleep between __ and __ hours per night.

About 68% of college students typically sleep between 5.3 and 8.7 hours per night.

About 95% of college students typically sleep between 3.6 and 10.4 hours per night.

About 99.7% of college students typically sleep between 1.9 and 12.1 hours per night.

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

we have,

Mean = 7

Standard deviation = 1.7

About 68% of college students typically sleep between 5.3 and 8.7 hours per night.

About 95% of college students typically sleep between 3.6 and 10.4 hours per night.

About 99.7% of college students typically sleep between 1.9 and 12.1 hours per night.

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About 68% of college students typically sleep between 5.3 and 8.7 hours per night.

About 95% of college students typically sleep between 3.6 and 10.4 hours per night.

About 99.7% of college students typically sleep between 1.9 and 12.1 hours per night.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 7

Standard deviation = 1.7

7 + 1*1.7 = 8.7

7 - 1*1.7 = 5.3

About 68% of college students typically sleep between 5.3 and 8.7 hours per night.

7 + 2*1.7 = 10.4

7 - 2*1.7 = 3.6

About 95% of college students typically sleep between 3.6 and 10.4 hours per night.

7 + 3*1.7 = 12.1

7 - 3*1.7 = 1.9

About 99.7% of college students typically sleep between 1.9 and 12.1 hours per night.

452,489 to the nearest thousand is 452,000