Question

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 H0; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800 B. reject H0; we can conclude that the mean number of customers visiting the dealership is significantly less than 800 C. do not reject H0; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800 D. do not reject H0; we can conclude that the mean number of customers visiting the dealership is significantly less than 800

          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 H0; we cannot conclude that the mean number of
customers visiting the dealership is significantly less than
800
B. reject H0; we can conclude that the mean number of
customers visiting the dealership is significantly less than
800
C. do not reject H0; we cannot conclude that the mean
number of customers visiting the dealership is significantly less
than 800
D. do not reject H0; we can conclude that the mean number
of customers visiting the dealership is significantly less than
800

Added by Kelly C.

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