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

question 69

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