Answer the question.Which of the following describes a study in which the researchers do not attempt to change the characteristics of those being studied?
A. Case-control study
B. Single-blind experiment
C. Observational study
D. Double-blind experiment
Answer: C
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The following question refers to a country with six states. There are 300 seats in the legislature, and the populations of the states are given in the table below.
Find each state's apportionment under Webster's method.
A. State A: 47; State B: 147; State C: 15; State D: 52; State E: 16; State F: 23 B. State A: 46; State B: 148; State C: 15; State D: 52; State E: 16; State F: 23 C. State A: 46; State B: 149; State C: 15; State D: 52; State E: 15; State F: 23 D. State A: 47; State B: 148; State C: 15; State D: 52; State E: 15; State F: 23 E. none of these
A. C(3, 8); D(-3, 7) B. C(-4, 3); D(-3, 7) C. C(-4, 3); D(7, -3) D. C(-4, -3); D(3, -3)
Set up an integral for the length of the curve.x = 3 tan y, 0 ? y ? 
A. 
B. 
C. 
D. 
Verify the integration formula.
ln (cosh x2) + C
A. Yes B. No