Explain why existence of potentially confounding factors

Reference no: EM131010191

The article "Americans are ‘Getting the Wrong Idea' on Alcohol and Health" (Associated Press, April 19, 2005) reported that observational studies in recent years that have concluded that moderate drinking is associated with a reduction in the risk of heart disease may be misleading. The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers. Explain why the existence of these potentially confounding factors prevent drawing the conclusion that moderate drinking is the cause of reduced risk of heart disease.

Reference no: EM131010191

Questions Cloud

Who challenged the dominant notion : Who described her recruitment of subjects in one of her studies as follows: "I located subjects by driving around looking for diapers drying on clotheslines"? Who challenged the dominant notion of the 1930s that psychoanalysts required a medical de..

Case study- risk factors directions : Student addresses the concerns Mrs. Sween's nurse may have - Student includes risk factors to Mrs. Sween's health.

Set of all possible y values : a. What is the smallest possible y value, and what experimental outcome gives this y value? What is the second smallest y value, and what outcome gives rise to it? b. What is the set of all possible y values?

What is the difference between explicit and implicit cost : How would we determine if a cost is a fixed cost or a variable cost?

Explain why existence of potentially confounding factors : The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers.

Earthquake-prone area of california : Suppose that 20% of all homeowners in an earthquake-prone area of California are insured against earthquake damage. Four homeowners are selected at random; let x denote the number among the four who have earthquake insurance.

Different possible outcomes : Suppose that a computer manufacturer receives computer boards in lots of five. Two boards are selected from each lot for inspection. We can represent possible outcomes of the selection process by pairs. For example, the pair (1,2) represents the s..

Determine the probability distribution : The value of x for the (1,2) outcome is 0 (neither selected bottle is good), and x = 1 for the outcome (2,4). Determine the x value for each possible out- come. Then use the probabilities in Part (b) to determine the probability distribution of x.

Is study described an observational study or experiment : They found that children who averaged more than two hours of television viewing per day when they were younger than 3 tended to score lower on measures of reading ability and short term memory. Is the study described an observational study or an e..

User Account

All Pages