Because random assignment is likely to create groups of different ...

[geodog55]

Because random assignment is likely to create groups of different sizes, researchers often employ ____.
 
  a. restricted random assignment
  b. matched random assignment
  c. simple random assignment
 d. sampling

Question 2

If you could see all random error in a distribution, it would ____.
 
  a. have a variance equal to the mean
 b. sum to zero
 c. shift the mean in a positive direction
 d. be greater than the population variance

[peter]

Answer to Question 1

a

Answer to Question 2

b

[geodog55]

Great answer, keep it coming

[helenmarkerine]

Thanks for the timely response, appreciate it