Consider the following data set At the Sydney store a sample of 100 customers spent an average of $2711 with standard deviation $60 and at the Melbourne store a sample of 100 customers spent an average of $2712 with standard deviation $80 What is the p-value for testing if there is a difference between means use software such as http://www.usablestats.com/calcs/2sampletosummary=1 click here for a guide to usigng the webpage or use the p-value calculator guide to using the p-value calculator Click here for a guide for using the p-value calculator if you enter the numbers correctly the test stat should be -0.1 There are many p-values in the output, Always use the first p-value in the output