Suppose you work as a manager for a large clothing store. You are considering introducing a loyalty program to encourage customers to spend more at your store. Before rolling out your program to the public, you want to do a small experiment to estimate its effectiveness. You offer the loyalty program to 15 random customers, and also observed the sales of 18 random customers who did not get the program as a control group. The customers that were part of the loyalty program had average monthly sales of $309.40 and a sample standard deviation of $49.30. For the control group, the customers had an average monthly sales of $219.27 and a sample standard deviation of $73.28. Using this information to conduct a hypothesis test to investigate if introducing a loyalty program will increase the average monthly sales of customers in your store. Use the order Mloyalty program - Hno loyalty program in your hypothesis test. What is the test statistic for your analysis? Note: 1- Only round your final answer. Round your final answer to two decimal places