please tell me if there is any wrong answers: Suppose a prospective study is con

Question

please tell me if there is any wrong answers:

Suppose a prospective study is conducted to determine if living in areas of high pollution is linked with lung cancer. Participants are assigned to either a treatment group or a control group. Participants in the two groups are similar except that Participants in treatment group live in areas of high air pollution, whereas those in the control group do not live in areas of high air pollution Participants in treatment group do not have lung cancer whereas those in the control group do. Participants in the control group smoke and have lung cancer and live in areas of high air pollution, whereas those in the treatment group neither smoke nor have lung cancer, nor do they live in areas of high air pollution. Participants in the treatment group must live in an area of high air pollution and have lung cancer whereas those in the control group neither live in an area of high air pollution, nor do they have lung cancer.

Explanation / Answer

Solution:-

1) option A.

2) option A.

mean = (41/6) = 6.8

range = 13 - 1 = 12.

3) option A.

  => X +/- Z*sd = 125 +/- (1.96*10) = (105.4 , 144.6)

4) option E.

P(X > 112) = P(Z > (112-185)/39) = P(Z > -1.8717) = P (Z < 1.8717) = 0.9693

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