The critical hurdle with measuring treatment effects is that:
A. our subjects cannot be both untreated and treated at the same time.
B. it's always equal to the effect of the treatment on the treated.
C. it's hard to have a truly random treatment assignment.
D. we have selection bias.
Answer: A
You might also like to view...
Competent cells are those used in studies of conjugation
Indicate whether the statement is true or false
Light availability within a forest is lowest in the
A) canopy layer. B) midstory layer. C) understory layer. D) ground layer.
Why do tumor cells in mammals have telomerase activity?
What will be an ideal response?
Assume that having three nostrils is inherited as a sex-linked trait on the Y chromosome. A man with three nostrils has a daughter who has a son with a man who has only two nostrils
What is the probability that the three-nostriled man's grandson has three nostrils? A) 0% B) 25% C) 50% D) 100%