Answer Happy

Use a t-test to test the claim about the population mean w at the given level of significance a using the given sample statistics. Assume the population is normally distributed Claim: 128000; c = 0.05 Sample statistics: X = 7800, s = 480, n=21 What are the null and alternative hypotheses? Ο Α. Ηο: μs 8000 H, μ> 8000 OC. Ha Hº 8000 He: u = 8000 B. Ho: 28000 Η μ< 8000 D. Ho: u=8000 Hu* 8000 What is the value of the standardized test statistic? The standardized test statistic is (Round to two decimal places as needed) What is the P-value? (Round to three decimal places as needed.) P=

Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below. A. Reject Ho. At the 5% level of significance, there is enough evidence to reject the claim. B. Reject Ho. At the 5% level of significance, there is not enough evidence to reject the claim. C. Fail to reject Ho. At the 5% level of significance, there is not enough evidence to reject the claim. D. Fail to reject H. At the 5% level of significance, there is enough evidence to reject the claim