In this study the independent variable was

In this study the independent variable was
 
  a. Which drug the groups were given
  b. The incidence of hay fever
  c. The age of the subjects
  d. The gender of the subjects.

Question 2

When doing the ordinal T test, it is important to establish
 
  a. the signed ranks
  b. frequency of occurrence
  c. the difference between the means
  d. all of these

Question 3

The ordinal T test shown in the text requires at least
 
  a. 12 pairs of scores
  b. 16 independent scores
  c. 6 pairs of scores
  d. 25 independent scores

Question 4

If ordinal data were obtained from a three-group, matched-subjects design,
  then the appropriate test would be the
 
  a. T
  b. H
  c. U
  d. Friedman ANOVA by ranks