Module 1 - Introduction to Statistics

Question 1

What are the 3 major types of data?

Answer 1

1. Numerical
2. Nominal
3. Ordinal

Question 2

What is Population?

Answer 2

The set of all items of interest

Question 3

What is Sample?

Answer 3

A set of data drawn from the studied population.

Question 4

What are descriptive statistics?

Answer 4

Methods of organising, summarising and presenting data in ways that are useful, attractive and informative to the reader

Question 5

What is Numerical data?

Answer 5

Data that involves values or real numbers(Quantitative)

Question 6

What is Nominal data?

Answer 6

Data that involves categories e.g colours/age/names ect (Qualitative)

Question 7

What is Ordinal data?

Answer 7

The ranking of nominal data (Ranked)

Question 8

What are some graphical techniques for nominal data?

Answer 8

Bar charts
Pie charts
and frequency distributions

Question 9

What is frequency distribution?

Answer 9

Method of presenting data and their counts in each category or class

Question 10

What is a histogram?

Answer 10

Graphical presentation of a frequency distribution of numerical data

Question 11

What are classes?

Answer 11

Non overlapping intervals of numerical data? e.g 31-40, 41-50 ect

Question 12

Shapes of Histograms, what are the aspects to examine?

Answer 12

1. Symmetry
2. Number of modes
3. resemblance to a bell shape