Inferential testing Flashcards Preview

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Flashcards in Inferential testing Deck (12):
1

What is probability?

The likelihood of events being determined by chance

2

Why do psychologists use a 5% level of significance in research?

It strikes a balance between the risk of making the Type I and II errors

3

What is a type I error?

Reject null when it is true and accept alternative (false positive)

4

What is a type II error?

Accept null when it is false and reject when it alternative is true (false negative)

5

What is inferential testing?

Statistical procedures that make predictions about populations from mathematical analysis of data taken from samples

6

What is the rhyme you use to remember nominal data?

Naughty Children Swear Constantly

Nominal: Chi-squared, Sign test, Chi-squared

7

What is the rhyme you use to remember ordinal data?

Only Men Want Sausages

Ordinal: Mann-Whitney, Wilcoxon, Spearman

8

What is the rhyme you use to remember interval data testing?

I Usually Rate Pizza

Interval: Unrelated t-test, related t-test, Pearsons

9

What are the two other names for a type I error?

- Error of optimism
- False positive

10

What are the two other names for a type II error?

- Error of pessimism
- False negative

11

Why would researchers use a one-tailed test?

They have previous knowledge indicating results, meaning they have a directional hypothesis

12

Why is statistical testing used?

To determine the likelihood that results are due to chance factors and to gain meaning from data