Chapter 13: Understanding research results: statisitical inference

Question 1

What is the Null Hypothesis?

Answer 1

Hypothesis that if you were to have 2 conditions, performance would be the same/nothing would happen

researchers want to reject this hypothesis because they are searching for differences

Question 2

What is the Research/Alternative hypothesis?

Answer 2

Counters the null, says something will happen/treatment will have an effect

researchers want to fail to reject this hypothesis

Question 3

What are the 2 most common inferential tests?

Answer 3

t and F tests

Question 4

When is a t test used?

Answer 4

Used to examine whether 2 groups are significantly different from each other

Question 5

what does it mean if your t falls into the region of rejection?

Answer 5

• reject the null hypothesis

- your results are significant

Question 6

A t value of what is significant?

Answer 6

2+

Question 7

When is an F test used? What is it?

Answer 7

when there is 3+ conditions or if its a factorial design with more than one IV

ANOVA/analysis of variance

Question 8

T/F the F test can only be negative

Answer 8

false, it can only be positive

Question 9

what does it mean if your t falls outside the region of rejection?

Answer 9

• fail to reject the null hypothesis

- your results are not significant