Children Watching TV. The A. C. Nielsen Company reports in the Nielsen Report on
ID: 3199933 • Letter: C
Question
Children Watching TV. The A. C. Nielsen Company reports in the Nielsen Report on Television that the mean weekly television viewing time for children aged 2-11 years is 24.50 hours. 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. 68.26% of all such children watch between _______ and ______ hours of TV per week 95.44% of all such children watch between _______ and _______ hours of TV per week. 99.74% of all such children watch between ______ and ________ hours of TV per week.Explanation / Answer
Rcode:
> m<-24.5
> s<-6.23
> ll1<-qnorm((1-.6826)/2,m,s)
> ul1<-qnorm((1-.6826)/2,m,s,lower.tail = F)
> ll2<-qnorm((1-.9544)/2,m,s)
> ul2<-qnorm((1-.9544)/2,m,s,lower.tail = F)
> ll3<-qnorm((1-.9974)/2,m,s)
> ul3<-qnorm((1-.9974)/2,m,s,lower.tail = F)
>
> ll1;ul1
[1] 18.27115
[1] 30.72885
> ll2;ul2
[1] 12.04575
[1] 36.95425
> ll3;ul3
[1] 5.738643
[1] 43.26136
Answer:
a) 68.28% of all such children watch between 18.27115 and 30.72885 hours of TV per week.
b) 95.44% of all such children watch between 12.04575 and 36.95425 hours of TV per week.
c) 99.74% of all such children watch between 5.738643 and 43.26136 hours of TV per week.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.