Processing and Representing Data 2 Flashcards
Database
A database is a collection of information
Two way tables
Shows information in two catagories
Bivariate data
Data that has two variables
Pictogram
Uses symbols or pictures to represent a number of items
What must be common on a bar chart?
- Bars are equal width, with equal spaces
- The height (or length) of the bar represents the frequency
Vertical line graph
Is similar to a bar chart, but with lines instead of bars
Multiple bar charts
Have more than one bar for each class. A key shows what each bar represents. It’s easy to compare the frequencies of each chart.
Composite bar chart
compares data for each category in a single bar, divided into components that show frequency for each part. A key identifies each component.
Stem and Leaf Diagram
shows numerical data split into a ‘stem’ and ‘leaves’. The numbers written in order.
Back-to-Back stem and leaf diagrams
Shows two sets of data with the same stem, the smallest values on each row are nearest the stem.
Pie Chart
A form of displaying data in a circle with the proportions of shared data in proportion
The angles of a pie chart add up to ???
360
Comparative pie charts
Used to compare two sets of data
Population Pyramids
Show the age groups in a population, usually divided by gender
Chloropleth map
Used to classify regions of a geographical area
