A bank manager wishes to estimate the average waiting time for customers in line for tellers. A random sample of 50 times is measured and the average waiting time is 5.7 minutes. The population standard deviation of waiting time is 2 minutes. Which Excel function would be used to construct a confidence interval estimate?
A) CONFIDENCE.NORM
B) NORM.INV
C) T.INV
D) INT
Correct Answer:
Verified
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