The weight loss franchise home office wanted to compare the results of two centers. Of 200 randomly selected participants from center A, 152 lost at least 10 pounds. Of 140 randomly selected participants from center B, 109 lost at least 10 pounds.
Construct a 98 confidence interval for the difference between the proportions of participants at center A and participants at center B who lost at least 10 pounds.
A) -0.1093 to 0.0722 B) -0.1378 to 0.1007 C) -0.1264 to 0.0893 D) -0.0947 to 0.0576
Question 2
Researchers wanted to determine whether there was an association between high blood pressure and the suppression of emotions. The researchers looked at 1800 adults enrolled in a Health Initiative Observational Study.
Each person was interviewed and asked about their response to emotions. In particular they were asked whether their tendency was to express or to hold in anger and other emotions. The degree of suppression of emotions was rated on a scale of 1 to 10. Each person's blood pressure was also measured. The researchers analyzed the results to determine whether there was an association between high blood pressure and the suppression of emotions.
A) cross-sectional; Information is collected at a specific point in time.
B) retrospective; Individuals are asked to look back in time.
C) cohort; Individuals are observed over a long period of time.
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