Question

A watchdog association claims that the percentage of Americans who agree that the government is inefficient and wasteful is different from 70%. A researcher wants to test this claim. The researcher conducts a survey and finds that out of a random sample of 1175 Americans, 785 agreed with this view.

17. The standardized test statistic for a hypothesis test which tests whether the sample proportion is not equal to the hypothesized population proportion is equal to: a, -2.387     b 2.378 c. 2.387

18. The probability value of the event that the standardized test statistic would assume a value as small or as large as that calculated in question 17 is:        a. 0.0017           b. 0.017 c. 0.17

19. By comparing the probability value calculated in question 16 with a level of significance of 0.01 in a hypothesis test, we cannot reject the statement that a. the proportion of Americans who agree that the government is inefficient and wasteful is different from 70%. b. the proportion of Americans who agree that the government is inefficient and wasteful is equal to 70% c. the proportion of Americans who agree that the government is inefficient and wasteful is greater than 70%

20. The 99% confidence interval for the proportion of Americans who agree that the government is inefficient and wasteful will fall between:                          a. (0.633, 0.703)   b. (0.641, 0/695)   c. (0.645, 0.691)

Answer 1