1. The owner of a large car dealership believes that the closing of two local businesses has decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. She decides to test the null hypothesis that the average number of customers is at least 800 vs. the alternative hypothesis that the average number of customers is less than 800. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. The sample standard deviation was 350. What is the value of the test statistic she should use for this test? Round your answer to 2 decimal places