Identify the critical value(s). Select the correct choice below and fill in the answer box within your choice. (Round to three decimal places as needed.) A- The critical value is 20' = B- The critical value is -20: = C? C- The critical values are 120\"\"; = i the null hypothesis. The data sufficient evidence to conclude that the mean isA sample mean, sample size, and population standard deviation are provided below. Use the onemean ztest to perform the required hypothesis test at the 10% signicance level. i=31, n=28,o=6, H0:p=32,Ha: \"#32 The test statistic is z = D. (Round to two decimal places as needed.)