Identify the kind of correlation appropriate for use in solving ...

[Mr. Wonderful]

Identify the kind of correlation appropriate for use in solving each of the following problems. To find the relationship between gender and watching a specific TV program or another in the same time slot.
 
  a. Pearson's r c. phi coefficient
  b. Spearman rho

Question 2

Identify the major threat to internal validity in the following research studies. Students who had low scores on a reading pretest were chosen for a special instructional program. This group showed significant gains on a reading achievement test administered after a period of four months.
 
  a. Regression
  b. Diffusion
  c. Mortality
  d. Selection
  e. History

[carlsona147]

Answer to Question 1

C

Answer to Question 2

A