Multiple Choice
A consumer group would like to estimate the mean monthly electricity charge for a single family house in July (within $5) using a 99 percent level of confidence. Based on similar studies the standard deviation is estimated to be $20.00. How large a sample is required?
A) 105
B) 106
C) 107
D) 108
E) 109
Correct Answer:
Verified
Correct Answer:
Verified
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