Display of quantitative data

Question 1

Tables

Answer 1

raw data can be set out in a table and summarised using a measure of central tendency or dispersion
- help interpret findings

Question 2

Frequency tables

Answer 2

data that tells you how frequently certain items occurred

Question 3

Bar chart

Answer 3

frequency data can be represented in a bar chart
- height of each bar represents the frequency of each item
- suitable for data that is not continuous

Question 4

Histogram

Answer 4

• similar to a bar chart except the area within the bars must be proportional to the frequency represented
• continuous data — cannot draw data in categories
• no gaps between the bars

Question 5

Line graph

Answer 5

• has continuous data on the x- axis and there is a dot to mark the top of each bar
• each dot is connected by a line

Question 6

Pie chart

Answer 6

• another way to represent frequency data or can be used to represent any proportion

Question 7

Scatter diagram

Answer 7

• graph used when doing correlational analysis