With a positive Pearson's r, the slope of the regression line will be _____.

With a positive Pearson's r, the slope of the regression line will be _____.
 
  a. positive
  b. negative
  c. 0
  d. equal to

Question 2

For the t ratio, the larger the sample size
 
  a. the larger the alpha level
  b. the larger the beta level
  c. the larger the number of groups being compared
  d. the larger the number of degrees of freedom

Question 3

When an experimenter assigns a grouping variable, that variable is the
 
  a.dependent variable
   b.independent variable
   c.control variable
   d.all of these, depending on the method being used.

Question 4

When the correlation in a sample is found to be significant, then it is
  assumed that
 
  a. the mean of Y differs from the mean of X in the population
  b. the mean of Y equals the mean of X in the population
  c. the regression of Y on X cannot be determined
  d. the correlation also exists in the population