Prospective and retrospective studies are both considered:
A) experimental studies.
B) longitudinal studies.
C) clinical trials.
D) correlational studies.
Question 2
A risk factor is any characteristic or condition that
A) occurs with a lower frequency in peole with a disease than in people freee from that disease.
B) occurs with a higher frequency in people with a disease than in people free from that disease.
C) is any factor that has been demonstrated to be responsible for causing a disease.
D) is a measure of the dependent variable that is utilized in an experimental design.
Lake 226 at the Experimental Lakes Area divided in half.
Each experimental organism used in cell biology has advantages for certain types
Raphael, Studies for The Alba Madonna (recto).
Cross-Sectional Studies
Self-esteem for Grade 3 and 4 children in Harter\'s studies
Experimental evidence that signals from dorsal lip cells initiate amphibian gastrulation. A dorsal l