Question

A 99% confidence interval for the population mean difference in weight of all kittens (3 month old) and of all cats (2 years old) is (3,4)

(in pounds).

You may assume the assumptions hold. Interpret this interval in full context.

Using this interval, would you conclude at the 5% significance level that, on average, the weight of a cat and a kitten differ?

(Hint: Would you conclude this at the 1% level? What does that tell you about the 5% level?)

Answer 1