Exhibit 9-6
A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 75%.
-Refer to Exhibit 9-6. The p-value is
A)0.2112
B)0.05
C)0.025
D)0.0156

Question

Quizplus · Accepted Answer

The sample proportion is 0.8 (80 out of 100). We test the null hypothesis that the population proportion is 0.75 against the alternative that it is greater than 0.75. Using a z-test for proportions, the calculated z-value is approximately 1.67. The p-value for a one-tailed test with z = 1.67 is approximately 0.0156.

Exhibit 9-6 a Random Sample of 100 People Was Taken. Eighty of Eighty