A sample of 100 information systems managers had an average hourly income of $40.00 with a standard deviation of $8.00. The 95% confidence interval for the average hourly wage (in $) of all information system managers is

A. 38.684 to 41.316.
B. 32 to 48.
C. 38.432 to 41.568.
D. 39 to 41.


Answer: C

Business

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