Exhibit 19-2 Students in Statistics Classes Were Asked Whether They Preferred a Preferred

question 26

Multiple Choice

Exhibit 19-2
Students in statistics classes were asked whether they preferred a 10-minute break or to get out of class 10 minutes early. In a sample of 150 students, 40 preferred a 10-minute break, 80 preferred to get out 10 minutes early, and 30 had no preference. We want to determine if there is a difference in students' preferences.
-Refer to Exhibit 19-2. The mean and the standard deviation of the sampling distribution of the number of students who preferred to get out early are

• A)50 and 30
• B)60 and 30
• C)50 and 5.478
• D)60 and 5.478

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