You obtained robs= +.39 when correlating the number of hours per ...

[geodog55]

You obtained robs= +.39 when correlating the number of hours per week spent studying by a student and his or her grade point average. In order to find if this correlation coefficient is statistically significant, you need to know the _____ .
 
  a. means for both variables
  b. standard deviation for both variables
   c. number of pairs of scores on which robs was based
  d. CPXY for this correlation

Question 2

The dilemma facing the experimenter is determining how large a difference between the
  sample means is enough to decide that something other than _____ is at work in the
  experiment.
 
  a. the independent variable
  b. a treatment effect
   c. sampling error
  d. systematic variation

[stillxalice]

Answer to Question 1

C

Answer to Question 2

C