D Question 17 2 pts The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population is normal with the standard deviation is 350. At the 5% significance level, the decision is to O do not reject the null; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800 O do not reject the null; we can conclude that the mean number of customers visiting the dealership is significantly less than 800 O reject the null; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800 O reject the null; we can conclude that the mean number of customers visiting the dealership is significantly less than 800