D Question 27 2.86 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 standard deviation is 350. At the 5% significance level. the decision is to O do not reject Ho; we can conclude that the mean number of customers visiting the dealership is significantly less than 800 O reject Ho: we can conclude that the mean number of customers visiting the dealership is significantly less than 800 O reject Ho: we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800 O do not reject Ho: we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800