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, identify the null hypothesis and the alternative hypothesis, and explain how the sample data contradict or do not contradict the alternative hypothesis. Exercise Sign Test for Freshman 15?The table below lists some of the weights from Data Set 4 in Appendix B. Those weights were measured from college students in September and later in April of their freshman year. Assume that we plan to use the sign test to test the claim of no difference between September weights and April weights. What requirements must be satisfied for this test? Is there any requirement that the populations must have a normal distribution or any other specific distribution? In what sense is this sign test a “distribution-free test”?

Solution 3BSC Step 1 By assuming that we plan to use the sign test to test the claim of no difference between September weights and April weights. The Hypotheses can be expressed as H0 There is no difference between September weights and April weights. H1 There is a difference between September weights and April weights.