The table below shows the results of a study of the effects that maternal use of

Question

The table below shows the results of a study of the effects that maternal use of alcohol during pregnancy This is an example of th test of independeence (two-way x2 test) .This study invistigates whether the two variables,women alcohol consumption and smoking status, are independent. What is the probability of a woman's being in the smoking group and in the nondrinking group? lcohol Consumption edium Medium gh (O) High (E) Total 2.7 0.4 None (O) None (E) Low (O Low (E) 1689.4 194 788.5 172 138.1 198 929 11127 Smoker 1880 on-smoker 4290 170 327.8 2048 3842.2 2430 478 76 7.9 otal 113 SquareTable .37728 62272 0 .03289 ·2092

Explanation / Answer

P( Women being in Smoking Group and in the Non drinking Group)

= (1880+2048+194+76)/11127

= 0.37728

So, Correct Option is A

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