Average speed of greyhound dogs is about 18.4 meters per second.
A particular greyhound breeder claims that her dogs are faster than the average greyhound.
In a sample of 35 of her dogs, they ran, on the average, 18.7 m/s.
Assuming a population standard deviation of 1.5 m/s and a .05 significance level, does this sample data provide evidence that the breeder's claim is correct?