Use the Following Information for Questions:
a Safety Officer $\mu$

Multiple Choice

Use the following information for questions:
A safety officer wants to prove that $\mu$ = the average speed of cars driven by a school is less than 25 mph. Suppose that a random sample of 14 cars shows an average speed of 24.0 mph, with a sample standard deviation of 2.2 mph. Assume that the speeds of cars are normally distributed.
-What is the value of the test statistic?

A) t = -01.80
B) t = -1.70
C) t = -1.50
D) None of the above