If a significant main effect involves an independent variable ...

[Capo]

If a significant main effect involves an independent variable with two conditions, the main effect is interpreted by
 
  a. testing the simple main effects
  b. inspecting the means
  c. conducting an ANOVA
  d. doing follow-up or post hoc tests
  e. testing the interaction

Question 2

For multiple group experiments, how many control groups must be included in the design to
  gather valid information?
 
  A) at least one B) at least three
  C) at least two D) A control group is not necessary.

[carolinefletcherr]

Answer to Question 1

b

Answer to Question 2

D

[Capo]

Thanks for the timely response, appreciate it

[nguyenhoanhat]

TYSM