<PRE><B>Question 265607</B>
Children Watching TV. The A.C. Nielsen Company reports in te Nielsen Report on Television that the mean weekly television viewing time for children aged 2-11 years is 24.50 hours.
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Assume that the weekly television viewing times of such children are normally distributed with a standard deviation of 6.23 hours and apply the 68.26-95.44-99.74 rule to fill in the blanks. 
a.68.26% of all such children watch between 18.24 and 30.57 hours of TV per week.
Ans: 24.5-6.23= 18.27 ; 24.5+6.23 = 30.57
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b. 95.44% of all such children watch between 24.5-2*6.23 and 24.5+2*6.23 hours of TV per week
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c. 99.74% of all such children watch between 24.5-3*6.23 and 24.5+3*6.23 hours of TV per week.

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Cheers,
Stan H. 

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