Contradicting H 1 An important step in conducting the sign test is to determine whether the sample data contradict the alternative hypothesis H 1 . For the sign test described in Exercise 1, identify the null hypothesis and the alternative hypothesis, and explain how the sample data contradict or do not contradict the alternative hypothesis.

Solution 3BSC

The null hypothesis is the claim of no difference between the September weights and the April weights, and the alternative hypothesis is the claim that there is a difference.

H0: There is no difference between the September weights and the April weights.

H1: There is a difference between the September weights and the April weights.

From the given problem the following information is obtained