When a significant difference is found between the DV scores of the experimental and control ...

When a significant difference is found between the DV scores of the
  experimental and control groups, it always means that this difference is
 
  a. important and profound
  b. due to chance
  c. due to confounding variables
  d. none of these

Question 2

In order to produce the regression line, the researcher must know
 
  a. how much the scatter points deviate from the line
  b. the slope of the line
  c. where the line crosses the ordinate
  d. all of these

Question 3

Percentage of scores falling between z's of -.15 and -.44
 
  What will be an ideal response?