Suppose we examined medical records of 500 individuals admitted to the hospital, and we cross-classified them by whether they had lung disease or some other disease and the number of cigs they smoked daily. The individuals in the sample were distribute 1.Compute the observed chi-square statistic (2 decimal places). 2.How many degrees of freedom are there? 3.What is the critical chi-square statistic at the .05 level of significance? 4.Based on these sample data, is there a statistically significant relationship (at the .05 level) between whether one enters the hospital with lung cancer (vs. something else) and the number of cigarettes
Suppose we examined medical records of 500 individuals admitted to the hospital, and we cross-classified them by whether they had lung disease or some other disease and the number of cigs they smoked daily. The individuals in the sample were distribute
1.Compute the observed chi-square statistic (2 decimal places).
2.How many degrees of freedom are there?
3.What is the critical chi-square statistic at the .05 level of significance?
4.Based on these sample data, is there a statistically significant relationship (at the .05 level) between whether one enters the hospital with lung cancer (vs. something else) and the number of cigarettes one smokes? What justifies this conclusion?
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