Topic 1

Question 1

What is a ‘case’?

Answer 1

A subject, item or individual for which data is collected

Question 2

What is a ‘variable’?

Answer 2

Any characteristic measured on the case

Question 3

What are the two overarching types of variables?

Answer 3

Numerical and categorical

Question 4

What are the two subtypes of numerical variables?

Answer 4

Continuous and discrete

Question 5

What are the two subtypes of categorical variables?

Answer 5

Ordinal and nominal

Question 6

What is a continuous variable?

Answer 6

A type of numerical variable with an endless amount of possible values

Question 7

What is a discrete variable?

Answer 7

A type of numerical variable with a limited amount of values

Question 8

What is an ordinal variable?

Answer 8

A type of categorical variable who’s categories have order

Question 9

What is a nominal variable?

Answer 9

A type of categorical variable who’s categories have no order

Question 10

What is an example of a continuous variable?

Answer 10

Height 1.66m, 1.78m, 1.84m etvc.

Question 11

What is an example of a discrete variable?

Answer 11

Number of siblings - 0, 1, 2 etc.

Question 12

What is an example of an ordinal variable?

Answer 12

Clothes sizing - small, medium, large etc.

Question 13

What is an example of a nominal variable?

Answer 13

Hair colour - blonde, brown, red etc.

Question 14

What chart is used for nominal data?

Answer 14

Pareto chart

Question 15

What chart is used for ordinal data?

Answer 15

Bar chart

Question 16

What chart is used for discrete variables? (2)

Answer 16

Bar chart for small amount of variables
Histogram for large amount of variables

Question 17

What charts are used for continuous variables? (2)

Answer 17

Histogram or boxplot
<25 values - boxplot, >25 values - histogram

Question 18

What charts are used for two categorical variables? (2)

Answer 18

Clustered bar chart or stacked bar chart