Lecture 1

Question 1

Measurement levels

Answer 1

Nominal
Ordinal
Interval
Ratio

Question 2

Nominal

Answer 2

Number only tells category, no ranking

Question 3

Ordinal

Answer 3

Ordered categories, tells nothing about the differences between values

Question 4

Interval

Answer 4

Information about differences between points on a scale, equal intervals equals equal differences

Question 5

Ratio

Answer 5

Same as interval, but with absolute 0

Question 6

Validity

Answer 6

Extent to which a measure correctly represents the concept of a study

Question 7

Internal validity

Answer 7

How well the study was done

Question 8

External validity

Answer 8

Generalize results to other situations

Question 9

Reliability

Answer 9

Extent to which a variable is consistent in what it is intended to measure

Question 10

Primary data (5)

Answer 10

• Collected by the researcher
• Raw data
• Better tailored data, matched to the research objective
• More prone to personal prejudice
• More original

Question 11

Secondary data (3)

Answer 11

• Collected by other agencies
• Ready for analysis
• Cheaper

Question 12

Selection bias

Answer 12

When the sample is fundamentally different from the sample

Question 13

How can you statistically test the representivity of your sample

Answer 13

T-test

Chi-square test