11. A coffee shop claims that its fresh-brewed drinks have a mean caffeine content of 80 milligrams per five

ounces. A city health agency is going to test this claim. The agency finds that a random sample of 42

five-ounce servings has a mean caffeine content of 83 milligrams and a standard deviation of 35

milligrams. At a 95% confidence level. is there enough evidence to reject the shop's claim?

a)

b)

c)

d)

e)

I'm having trouble working my way through this one and answering in this A-E format.