Suppose you are testing the idea that people with brown eyes have a greater pain tolerance than people with blue eyes. Which would be an appropriate null hypothesis?

a.

The mean for the sample of brown-eyes people will be the same as the mean for the blue-eyed sample

b.

The mean for the sample of brown-eyed people will be greater than the mean for the blue-eyed sample

c.

The mean for the population of brown-eyed people will be the same as the mean for the blue-eyed population

d.

The mean for the population of brown-eyed people will be greater than the mean for the blue-eyed population