The average natural gas bill for a random sample of 21 homes in a certain city...
The average natural gas bill for a random sample of 21 homes in a certain city during the month of March was $311.90 with a sample standard deviation of $51.60. What is the standard error of the mean for this sample?
A.
11.26
B.
8.20
C.
9.93
D.
14.74
Homework Answers
as we know that std error of the mean =std deviation/sqrt(n) =51.60/sqrt(21)=11.26
option A is correct
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