In a study of the death rates of smokers and nonsmokers in three countries, it is found that the nonsmokers have higher death rates than the smokers.
What technique could be used to address difficulties with the sampling units that produced this unusual result?
a. There is no technique available to address it
b. subclassification on propensity scores
c. time series design
d. lagged correlations
Question 2
In situations where one must work with intact groups but where there are also ethical implications concerning depriving both groups of the benefits of the experimental treatment, one uses a randomized design with a __________ control group.
a. zero
b. preexperimental
c. wait-list
d. placebo
The most abundant elements found in living organisms
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After the death of a loved one, family members report concerns about last place of care.
Probiotics are live microorganisms, usually bacteria, mainly found in cultured dairy foods
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