Levels Of Measurement

Question 1

Ordinal data

Answer 1

Ranked data where the difference between items isn’t the same

Question 2

Nominal data

Answer 2

Data in categories

Question 3

Measures of dispersion

Answer 3

Finding the spread of data

Question 4

Descriptive statistics

Answer 4

Characterising the data

Question 5

Interval data

Answer 5

Data with equal units and can have minus numbers

Question 6

Measures of central tendency

Answer 6

Finding the average eg mean, mode, median

Question 7

One tailed test

Answer 7

Directional - if previous research suggests a particular outcome

Question 8

Two tailed test

Answer 8

Non-directionaal, used if there is no previous research or research has contradicted findings

Question 9

P<0.05

Answer 9

probability of results being due to chance is less than 5%

Question 10

P<0.01

Answer 10

Probability of results being down to chance is 1%

Question 11

When is the 5% level used

Answer 11

Provides a balance between being too strict and too lenient, conventional level used in psych research

Question 12

When is 1% level used

Answer 12

Used when replicating established research findings, used for medical research when you need to be as sure as possible about conclusions drawn

Question 13

Type 1 error

Answer 13

Known as false positive - claim significance when there was none

Question 14

Type 2 error

Answer 14

Known as false negative - reject hypothesis because significance level was too strict