SOLUTION: the mean monthly utility bill for a sample of households in
a city is $91.79 with a standard deviation of $8.14. find the range of values in which at least 84% of the monthly bil
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-> SOLUTION: the mean monthly utility bill for a sample of households in
a city is $91.79 with a standard deviation of $8.14. find the range of values in which at least 84% of the monthly bil
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Question 1122834: the mean monthly utility bill for a sample of households in
a city is $91.79 with a standard deviation of $8.14. find the range of values in which at least 84% of the monthly bills lie. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The middle 84% are between 8% and 92%
z values for these are +/- 1.405
z=(x-mean)/sd
1.405*8.14=x-91.79
x-91.79=11.44
x=$103.23
and
x=$80.35
($80.35, $103.23)
