A weatherman stated that the average temperature during July in Chattanooga is 80 degrees. A sample of 32 Julys is taken to test the weatherman's statement and a sample mean of 84 degrees and sample standard deviation of 9) were observed. Assuming a student wants to perform a two-sided alternative test of hypothesis, answer the following; A. Find the mean and standard deviation of the sample mean B. Perform a test of significance and state your conclusion using a significance level of 5%