Questions 20 and 21 are related to the following

In a hypothesis test the objective is to test if the population mean is greater than 200. The p-value for the test, using the standard normal distribution, is reported to be 0.0409.

20 The test statistic is,

a 1.92

b 1.88

c 1.82

d 1.74

21 In the previous test the sample standard deviation is 39.659. The sample size is 324. What is the sample mean?

a 211.25

b 209.56

c 207.91

d 203.83

Next two questions are related to the following

You are testing the hypothesis that the population proportion is at least 0.75. You select a random of sample of size 400. The number of successes in the sample is 288.

22 The test is,

a an upper-tail test. The test statistic is 1.39.

b a lower-tail test. The test statistic is -1.39.

c an upper-tail test. The test statistic is 1.72.

d a lower-tail test. The test statistic is -1.72.

23 The p-value for the test is.

a 0.0823 Reject H₀ for α = 0.10, but do not reject for α = 0.05.

b 0.0823 Reject H₀ for α = 0.05, but do not reject for α = 0.10.

c 0.0427 Reject H₀ for α = 0.05, but do not reject for α = 0.01.

d 0.0427 Reject H₀ for α = 0.01, but do not reject for α = 0.05.

#### Top Answer

20) Option (d) is correct. 21) Option (d)... View the full answer