Exhibit 18-2 Students in Statistics Classes Were Asked Whether They Preferred a Preferred

Multiple Choice

Exhibit 18-2
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 18-2. The hypothesis is to be tested at the 5% level of significance. The decision rule is not to reject the null hypothesis if

A) -1.96 < z < 1.96
B) -1.645 < z < 1.645
C) z > 1.96 or z < -1.96
D) the number of "+" signs is greater than or equal to 20 and less than or equal to 130