In calculating power we calculate a statistic called delta (). This statistic is

In calculating power we calculate a statistic called delta (). This statistic is
 
  a. the effect size.
  b. the sample size.
  c. a combination of the effect size and the sample size.
  d. the difference we are looking for.

Question 2

Which of the following represents Cohen's rough estimates of small, medium, and large effect sizes?
 
  a. .20, .50, .80
  b. .00, .50, 1.50
  c. .80, .50, .20
  d. .40, .50, .60

Question 3

When people such as Cohen say that a medium size difference has an effect size of .50, they are saying that we want the power for
 
  a. one mean being half as large as another.
  b. one mean being half a point larger than another.
  c. one mean being half a standard deviation larger than another.
  d. one mean being based on half as many subjects as the other.

Question 4

When it comes to estimating the effect size we can use
 
  a. prior research.
  b. a statement of what we would expect to find.
  c. special conventions that have been set by others.
  d. all of the above