SOLUTION: assume the annual day care cost per child is normally distributed with a mean of $9000 and a standard deviation of $2000. in a random sample of 110 families, how many pay more than

Question 932808: assume the annual day care cost per child is normally distributed with a mean of $9000 and a standard deviation of $2000. in a random sample of 110 families, how many pay more than $6560 annually for day care per child?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
mean of $9000 and a standard deviation of $2000
n = 110

......
p( x > 6560) = p( z > -2440/190.7) = normalcdf( -12.8, 100) = basically ALL
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