A newspaper headline writer found that the more adjectives she put in the titles of her articles, ...

A newspaper headline writer found that the more adjectives she put in the titles of her articles, the greater the number of newspapers that were sold that day. This relationship between numbers of adjectives and newspaper sales must be
 
  a. significantly positive.
  b. significantly negative.
  c. monotonic.
  d. positive.

Question 2

Which of the following pairs go together?
 
  a. dependent variable : criterion variable
  b. dependent variable : predictor variable
  c. independent variable : criterion variable
  d. independent variable : Y variable

Question 3

If one of our variables is a dichotomy, the correlation we compute is
 
  a. Spearman's rS.
  b. a rank correlation.
  c. a point-biserial correlation.
  d. a tetrachoric correlation.

Question 4

An intercorrelation matrix is one that
 
  a. presents the correlations of each variable with each other variable.
  b. is symmetric.
  c. has as many rows as it does columns.
  d. all of the above