Question

The body weight of a healthy 3-month-old colt should be about μ = 72 kg. (a) If you want to set up a statistical test to challenge the claim that μ = 72 kg, what would you use for the null hypothesis H0? μ > 72 kg μ < 72 kg μ = 72 kg μ ≠ 72 kg (b) In Nevada, there are many herds of wild horses. Suppose you want to test the claim that the average weight of a wild Nevada colt (3 months old) is less than 72 kg. What would you use for the alternate hypothesis H1? μ > 72 kg μ < 72 kg μ = 72 kg μ ≠ 72 kg (c) Suppose you want to test the claim that the average weight of such a wild colt is greater than 72 kg. What would you use for the alternate hypothesis? μ > 72 kg μ < 72 kg μ = 72 kg μ ≠ 72 kg (d) Suppose you want to test the claim that the average weight of such a wild colt is different from 72 kg. What would you use for the alternate hypothesis? μ > 72 kg μ < 72 kg μ = 72 kg μ ≠ 72 kg (e) For each of the tests in parts (b), (c), and (d), respectively, would the area corresponding to the P-value be on the left, on the right, or on both sides of the mean? both; left; right right; left; both left; right; both left; both; righ

Answer 1

a)

μ = 72

b)

μ < 72 (since we are checking if it is less than)

c)

μ > 72 kg

d)

μ ≠ 72 kg

e)

left; right; both