People who wear seatbelts while driving survive more accidents ...

[bobbie]

People who wear seatbelts while driving survive more accidents than people who do not wear seatbelts. In this situation we can rule out
 
  a. common cause. c. spurious results.
  b. reverse causality. d. All of these are true.

Question 2

Identify the threats to internal validity illustrated in the example below. The students scored much higher on the posttest because the posttest was easier than the pretest.
 
  a. Instrumentation
  b. Experimental mortality
  c. Selection-maturation interaction
  d. Statistical regression
  e. Diffusion

[cascooper22]

Answer to Question 1

B

Answer to Question 2

A

[bobbie]

Gracias!

[cici]

Excellent