The Owner of a Large Car Dealership Believes That the Financial

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 ___________.

A) reject H_o;we can conclude that the mean number of customers visiting the dealership is significantly less than 800
B) reject H_o;we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800
C) do not reject H_o;we can conclude that the mean number of customers visiting the dealership is significantly less than 800
D) do not reject H_o;we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800