An experiment includes a treatment condition, a no-treatment ...

[tiara099]

An experiment includes a treatment condition, a no-treatment control, and a placebo control. Which two conditions should be compared to determine the size of the effect that is actually caused by the treatment?
 
  a. placebo versus treatment
 b. placebo versus no-treatment
  c. treatment versus no-treatment
  d. placebo control only

Question 2

What type of sample divides the population into nonoverlapping groups of N1, N2, N3, . . . Ni, such that N1 + N2 + N3 + . . . + Ni + N = N, and then performs a simple random sample of  = n/N in each of the nonoverlapping groups?
 
  a. simple random
 b. stratified random
 c. systematic random
  d. cluster random

[honnalora]

Answer to Question 1

a

Answer to Question 2

b