4. The following table shows results from a matched case-control study. A study of e'ects on hirthweight matched each case in which the child was underweight with a control in which the child had normal weight. The mothers, who were matched according to their age, were asked whether they were smokers (x= 0., no; x= 1, yes). mm... W... w (Controls) Nonsmokers Smokers Nonsmokers 159 22 Smoker 8 1 4 Source: Partly based on data in B. Mukherjcc. 1. Liu. and S. Sinha. Starsh Medic. 26: 3240-3257 {2007]. You will conduct a McNernar test to see whether the smoking status and low birth weight are related by following the sequence of questions. 3) Write the null hypothesis. b) Find the test statistic and p-value. c) Write the conclusion in terms of the context (under the signicance level 0.05)