Given a sample mean (xbar) of 46 and a population standard deviation sigma () of 3.4 from a previous study where n= 30 values, find the z value and p value. The data indicates that the population mean () for the new car Eco Auto is 49 miles per gallon but we think it may be lower based on our data. Test the claim that < 48. Hint: Use the P value calculator in the announcements to find the p value. Note: On this one you do not need to attach an excel spreadsheet.