1.In a study conducted by a pharmaceutical company, 605 out of 790 smokers and 122 out of 434 nonsmokers were diagnosed with lung cancer.

a.Construct a 2 * 2 contingency table relating smoking (SMOKING, categories smoker and nonsmoker) as the rows to lung cancer (LUNGCANCER, categories present and absent) as the columns.

b.Find the four expected cell counts when assuming independence.

c.State the hypotheses

H0:________________________________________________________

Ha:________________________________________________________

d.Compute for the test statistic.

x²:

df:

e.Draw the necessary normal curve.

f.Make a conclusion.

2.The following is a table for family income and marital happiness in 2012,

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