Question

A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 1% significance level. x = 27, n=31, o = 9, Ho: u = 33, Ha: u <33 The test statistic is z= - 3.71 . Round to two decimal places as needed.) dentify the critical value(s). Select the correct choice below and fill in the answer box within your choice. Round to two decimal places as needed.) O A. The critical value is - Za = . O B. The critical values are Za/2 = + O C . The critical value is Za = .

Answer 1

Solution! Given that, x=27 6= a n=31 L-o-ol Hoid=33 Ha: el <33 This is left -tailed test Test statistic, z - 27 7 3 3 3 23-3.71 The test statistic is ~3.71 The critical value = 2x = Zoool 3-2.33 option (C) is correct