The Average Greyhound Can Reach a Top Speed Of $18.8$ Meters Per Second

Multiple Choice

The average greyhound can reach a top speed of $18.8$ meters per second. A particular greyhound breeder claims her dogs are faster than the average greyhound. A sample of 50 of her dogs ran, on average, $19.2$ meters per second with a population standard deviation of $1.4$ meters per second. With $\alpha = 0.05$ , is her claim correct?

A) Yes, because the test value 0.04 falls in the noncritical region.
B) No, because the test value 0.40 falls in the critical region.
C) No, because the test value 0.04 falls in the critical region.
D) Yes, because the test value 2.02 falls in the critical region.