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. The value of the test statistic is ____________. Multiple Choice z = –1.429 t99 = 1.429 z = 1.429 t99 = –1.429

Answer:H0: μ = 800Ha: μ < 800Step-by-step explanation:The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean. For the case above;Let μ represent the average number of customers visiting the dealership per day The null hypothesis is that the average number of customers visiting the dealership per day is equal to 800H0: μ = 800The alternative hypothesis is that the average number of customers visiting the dealership per day is less than 800Ha: μ < 800