We are more likely to declare two populations to be different if ...

[ENagel]

We are more likely to declare two populations to be different if
 
  a. the means of our samples are very different.
  b. the variability of our samples is very large.
  c. the samples are normally distributed.
  d. all of the above

Question 2

Another name for sampling error is
 
  a. variability due to chance.
  b. error variance.
  c. constancy.
  d. both a and b

[xiaomengxian]

Answer to Question 1

A

Answer to Question 2

D