Week 3

Question 1

Population definition

Answer 1

A population is a complete set of objects

Question 2

Sample definition

Answer 2

A sample is a subset of a given population

Question 3

Types of variables

Answer 3

Independent
Dependent
Controlled

Question 4

Independent variable definition

Answer 4

Variable representing the value being changed or manipulated.
Controlled or selected to determine its relationship on a observed outcome

Question 5

Dependent variable definition

Answer 5

Observed result of the independent variables being manipulated
It is something that may depend on the independent variable

Question 6

Control variable definition

Answer 6

Variables that are kept constant to prevent them influencing the effect of the independent & dependent variables

Question 7

Types of data

Answer 7

Nominal
Ordinal
Interval
Ratio

Question 8

Nominal data

Answer 8

Cannot be ordered or counted
Eg (Country, gender, occupation)

Question 9

Ordinal data

Answer 9

Can be ordered, but not added or subtracted
Eg (A response on a questionnaire about service quality between 1 to 7)

Question 10

Interval data

Answer 10

Can be ordered, difference can be measured, but cannot compute a ratio
Eg (Exam mark, date, or year)

Question 11

Ratio data

Answer 11

Interval + can make ratio between the two
Eg (Distance, height, weight, annual income)