1- Descriptive statistics

Question 1

Descriptive statistics definition:

Answer 1

Methods of organising, summarising and presenting data in an informative way

Question 2

Inferential statistics definition:

Answer 2

A decision, estimate, prediction or generalisation about a population based in a sample

Question 3

Parameter definition:

Answer 3

Measurable characteristic of a population

Question 4

Statistic definition:

Answer 4

Measurable characteristic of a sample

Question 5

What are the four levels of measurement?

Answer 5

-Nominal
-Ordinal
-Interval
-Ratio
(NOIR)

Question 6

Nominal level data definition and example:

Answer 6

Data classifies into categories and cannot be arranged in a particular order. e.g. hair colour

Question 7

Ordinal level data definition and example:

Answer 7

Data arranged in some order, but the differences between data values cannot be determined or are meaningless. e.g. order of preference of political parties

Question 8

Interval level data definition and example:

Answer 8

Data arranged in some order and meaningful amounts of differences can be determined. There is no natural zero point. e.g. shoe sizes

Question 9

Ration level data definition and example:

Answer 9

The interval level with an inherit zero starting point. Differences and ratios are meaningful for this level of measurement. The zero point is the absence of the characteristic. e.g. income