Final answer:
A psychologist is conducting a study to explore the relationship between the breed of a horse and the number of hours it is ridden weekly, using a sample of 30 horse owners divided equally across three breeds.
Step-by-step explanation:
The question concerns a psychologist who is investigating whether there is a relationship between a horse's breed and the average number of hours per week that owners ride their horses. The research involves a set of participants who are horse owners with one of three specific breeds: Quarter Horses, Thoroughbreds, or Paint Horses. The psychologist has gathered data from a sample of 30 participants, ensuring an equal distribution across the three breeds, with 10 owners per breed. This study is likely aiming to determine if breed-specific characteristics influence riding habits or if other factors are more significant in determining the amount of time spent riding.