3. (10 pt) An article in a women's magazine reported that women who nurse their babies feel warmer and more receptive to

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3 10 Pt An Article In A Women S Magazine Reported That Women Who Nurse Their Babies Feel Warmer And More Receptive To 1 (37.85 KiB) Viewed 80 times

3. (10 pt) An article in a women's magazine reported that women who nurse their babies feel warmer and more receptive towards their infants than mothers who bottle feed. This conclusion was based on the following scores from a questionnaire designed to measure warmth and receptivity, given to a random sample of 10 women from each group taken from recent hospital birth records (higher score represents more warmth and reception). Nurse 48.4,51.5, 45.0, 47.0, 46.9,47.7, 49.9, 48.5, 45.6, 48.9 Bottle feed 42.5, 43.8, 44.5, 47.5,44.5, 45.6, 43.4, 44.6, 47.1, 45.8 (a) State the null and alternative hypotheses and carry out an appropriate test using R. Give the test statistic and the p-value. What do you conclude at significance level a = 0.05? (b) Is this an observational study or controlled experiment? Are there any possible con- founding factors? Carefully state in words what the correct conclusion should be.