SOLUTION: Please help with this homework problem ASAP!!!
16% of Americans never have time to relax. You random sample 400 and count the number X that never have enough time to relax.
1) Th
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-> SOLUTION: Please help with this homework problem ASAP!!!
16% of Americans never have time to relax. You random sample 400 and count the number X that never have enough time to relax.
1) Th
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Question 367154: Please help with this homework problem ASAP!!!
16% of Americans never have time to relax. You random sample 400 and count the number X that never have enough time to relax.
1) The mean of X is?
2)The Standard deviation of X is?
3) The probability that X is at least 80?
I answered:
1) 64
2) 3.46
3) about 0.0078
Is this correct? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! This is a binomial distribution.
1) correct
.
2)standard deviation = sqrt(n*p*(1-p))
=sqrt(400*.16*.84)
=7.33
.
3).0194 Binomial distribution probability calculator. http://stattrek.com/Tables/Binomial.aspx
.
Ed
