SOLUTION: In a group of students, 40% of them said they watch more than three hours of television on a typical school day. What is the probability that more than 86 of the students in a rand
Algebra.Com
Question 1189215: In a group of students, 40% of them said they watch more than three hours of television on a typical school day. What is the probability that more than 86 of the students in a random sample of 200 watches more than three hours of television on a typical school day?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
normal approximation to binomial
mean is 80=np
variance is 48=np(1-p)
sd=sqrt(V)=6.93
probability more than 86 is z > (86.5-80)/6.93, using continuity continuation factor.
z>0.9379 which is probability 0.1741
RELATED QUESTIONS
In a group of students, 40% of them said they watch more than three hours of television... (answered by Boreal)
A schoolteacher is concerned that her students watch more TV than the average American... (answered by stanbon)
A schoolteacher is concerned that her students watch more TV than the average American... (answered by richwmiller)
. A school principal is concerned that her students watch more TV than the average... (answered by psbhowmick)
The AC Nielsen Company reported in the Nielsen Report on Television that the distribution (answered by Boreal)
In a recent Super Bowl, a TV network predicted that 50 % of the audience would express an (answered by Boreal)
The lifetime of a color television is normally distributed with a mean of 7.8 years and a (answered by Fombitz)
I really need help with this.
A driving school has 600 trainees. On one particular day,... (answered by macston)
Children Watching TV. The A.C. Nielsen Company reports in te Nielsen Report on... (answered by stanbon)