A statistical test used to analyze multiple-group mean differences is a

A statistical test used to analyze multiple-group mean differences is a
 
  a) one-way ANOVA
 b) correlation coefficient.
 c) standard deviation.
 d) t test.

Question 2

What is the significance of the observation that mental processes take time and how does this observation inform cognitive psychology?
 
  a) It provides a basis for comparing the demands made by different types of internal processes
 b) It provides evidence that sequential processing is taking place.
 c) It provides support for the standard information processing model.
 d) It shows that parallel processing is not taking place.