Exhibit 8-6 A Sample of 75 Information System Managers Had an Average

Multiple Choice

Exhibit 8-6
A sample of 75 information system managers had an average hourly income of $40.75 with a standard deviation of $7.00.
-Refer to Exhibit 8-6. If we want to determine a 95% confidence interval for the average hourly income, the value of "t" statistics is

A) 1.96
B) 1.64
C) 1.28
D) 1.993