Which technique ensures that personal characteristics that might affect the outcome of an experiment are scattered among research participants in the different groups, thereby making the groups roughly equivalent?
A. dependent recursion
B. random assignment
C. independent assignment
D. regression to the mean
Answer: B
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Prorate the given expenses to find the monthly cost. Keiko pays $280 per month for food, a semiannual health insurance premium of $1200, and an annual car insurance premium of $500. Round your answer to the nearest dollar.
A. $563 B. $522 C. $422 D. $265
Find the indicated sum.
A. 54 B. 162 C. 108 D. 81
Simplify the expression.
+ tan ?
A. sin2 ? B. 1 C. cos ? + sin ? D. sec ?
Establish the identity.cos x csc x tan x = 1
What will be an ideal response?