Multiple Choice
The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month of March was $311.90 with a sample standard deviation of $51.60. The approximate standard error of the mean for this sample is _____ .
A) 8.20
B) 14.74
C) 9.93
D) 11.27
Correct Answer:
Verified
Correct Answer:
Verified
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