In a study, 1319 schoolchildren at the age of 12 were random selected to be questioned...

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In a study, 1319 schoolchildren at the age of 12 were randomselected to be questioned on the prevalence of symptoms of severecold. Another 1319 schoolchildren at age 14 were random selected tobe questioned on the prevalence of symptoms of severe cold. Forschoolchildren of age 12, 356 children were reported to have severecolds in the past 12 months, for schoolchildren of age 14, 468 werereported to have severe colds in the past 12 months. Is there anassociation between the prevalence of severe cold and the age of 12and 14?
Please conduct a hypothesis testing using the Chi-square test tojustify your conclusion.

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Solution CALCULATION TABLE COLD NOT COLD TOTAL AGE 12 356 963 1319 AGE 14 468 851 1319 TOTAL 824 1814 2638 EXPECTED FREQENCY E1 13698242638 412 O OBSERVED FREQUENCY E See Answer

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