If you have a sufficiently large random sample from the population, but do not know how treatment was assigned, what object will a confidence interval centered on the difference in average outcomes for the treated and control groups be describing?
A. ATE
B. ETT + Selection Bias
C. ETT
D. Selection Bias
Answer: B
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Some mice, known as ________ mice, are genetically bred to be missing particular genes.
Fill in the blank(s) with the appropriate word(s).
GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG. What effect does this mutation have on the population's mean fitness?
A. As the frequency of the GGC codon increases, the population's mean fitness level will remain the same.
B. As the frequency of the GGC codon increases, the population's mean fitness level will initially increase, but once GGC and GGG occur with equal frequency, the mean fitness will decrease.
C. As the frequency of the GGC codon increases, the population's mean fitness level will decrease.
D. As the frequency of the GGC codon increases, the population's mean fitness level will increase.
A community refers to ____
a. the interaction between populations and their environment b. the interaction between species and their environment c. an area in which a single species lives d. all species that live and interact in a specific area e. the nonliving components of an area
As a dermatologist trying to help reduce the incidence of skin cancer, which environmental agents known to be associated with skin cancer would you recommend your patients avoid?
A. cadmium B. benzene C. nickel D. arsenic E. polycyclic aromatic hydrocarbons F. endocrine disruptors