# Use two sided test under α 005 ci 8339 8807 p 00705

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significantly better than the population of sonar operators trained using the traditional method. (Use two sided test under α=0.05CI: (83.39, 88.07)P: .007<.05Reject Number of targets correctly identified 88 79 92 87 82 86 91 80 77 83 91 85 82 89 94Question 3:A clinical trial is conducted to determine the effectiveness of drug A in preventing premature birth. In thetrail, 30 pregnant women are to be studied, 15 received drug A and 15 in control group to receive placebo. The weights of the babies are given in the following table:Baby weight (lb)¿
patient numberTreatmentControl16.96.427.66.737.35.447.68.256.85.367.26.6785.885.55.795.86.2107.37.1118.27126.96.9136.85.6145.74.2158.66.8a.What type of test you will use to assess the effects of drug A?
b.Perform the test and make your conclusion. (Use two sided test and both critical value method and p-value method)
c.Construct the 95% confidence interval for mean difference.
Question 4 (Use both SPSS and by hand):Cigarette smoking has important health consequences and is positively associated with heart and lung diseases. Less well known are the consequences of quitting smoking. One study enrolled a group of 10 nurses, ages 50-54 years, who had smoked at least 1 pack per day and quit for at least 6 years. The nurses reported their weight before and 6 years after quitting smoking. The BMI of the 10 women beforeand after 6 years are given at the table:a.Perform a test to assess the mean BMI changes among heavy-smoking women 6 years after quitting smoking.b.Critical Value: 2.262c.We are outside of critical value range, so we reject null hypothesis d.Perform a test to assess whether the mean changes in BMI over 6 years is different between women who quit smoking and women who had never smoked.e.
Never-smoking womenHeavy-smoking womenIDBMI at baselineBMI at 6 years afterIDBMI at baselineBMI at 6 years after126.529.31125.631.1233.832.91224.427.6327.625.5133136.6424.428.31420.420.8521.623.31522.323.2632.337.11622.223.8731.935.41720.826.182324.81823.531931.230.41926.629.21036.337.1202324