stats

Question 1

3 levels of measurement
(based on DV)

Answer 1

1. ordinal data
2. nominal data
3. interval data

Question 2

Nominal data

Answer 2

-based on categories. Writing words down.
- e.g. category = gender , studying whether more girls or boys study language.

Question 3

Ordinal data

Answer 3

• measurements that can be ranked in order.
• e.g. rating scales from 1-10.
• memory tests use ordinal data because they measure how many items are remembered.

Question 4

Interval data

Answer 4

• more sophisticated level of data.
• gives a rank order of scores but also measures the precise intervals between scores. The difference between each number is the same.
• e.g time taken.

Question 5

Inferential testing

Answer 5

• Psychologists carry out statistical tests to find out whether data they gathered is significant
• tell us the probability of the differences in the scores being due to chance factors

Question 6

Statistically significant level

Answer 6

P < 0.05
- widely accepted level in science

Question 7

Hypotheses

Answer 7

• research must have 2 hypotheses: null, alternate
• we carry out a statistical test to decide which one to accept and reject.

P < 0.05 - accept alternate
P > 0.06 - accept the null

Question 8

2 errors

Answer 8

• TYPE 1 ERROR
  false positive
  Accepting the alternate when we should accept the null
• TYPE 2 ERROR
  false negative
  Accepting the null when we should accept the alternate