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Presenting Data

Presenting Data

There are various ways to present data. Each has its own advantages and is ideal for specific types of data such as numerical and categorical data.

Tables

We can easily collect, organise and present data in a simple and easy to understand way by putting it into a table. This may also help later on when you want to construct a graph from the data as the points will be easier to plot. We can use tables for almost any type of data.

Line Graphs

Probably the simplest way to present numerical data is to use a line graph. In these graphs both the dependent and independent variable is numerical. A line shows the effect of the independent variable and the dependent variable. Some cases in which we may use line graphs are: The effect of temperature on the speed of a chemical reaction The effect that the slope of a road has on driving speed Temperature at different times of day

Bar Charts

You can present data in a very simple format by using a bar chart. Bar charts are mainly used for categorical data. This type of data has non-numerical values as the independent variable and (mostly) numerical values as the dependent variable. Some examples of cases in which we may use bar charts are: Favourite colours of students in a school Colour of cars passing by a building The frequency of the 10 most common names in a town

Pie Charts

Pie charts are used to present data where you want to show a percentage of something. They are relatively easy to construct. However, we do not tend to use them very frequently in mathematics as there are not a lot of cases in which they are an appropriate way to present data. Some instances in which we can use them are: Percentage of energy that originates from different energy sources Percentage of inhabitants of different nationalities in a town Percentage of planes from different airlines departing at an airport

Cumulative Frequency Graphs

A cumulative frequency graph is a continuous total of frequency. It can be used to easily identify the frequencies below, above or in-between points. Cumulative frequency graphs are appropriate in the following scenarios: Grades of students Size of trees in a forest Distances run at a running competition

Histograms

Histograms show the frequency as well as the distribution or spread of the data. They are quite similar to bar charts but more complex and mathematical. Here are some cases in which they can be used: Ages of people in a town Heights of basketball players Lengths of cars

Box and Whiskers

Box an whiskers can be used to represent the distribution of data. The graphically show the min. and max. values along with the quartiles and the median. They can be used for almost any type of data.
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Learn How To Present Data

To learn how to present data, choose one of the topics above that interests you. We suggest that you start off with tables as it is the most basic skills that you should master. Please share this page if you like it or found it helpful!
Tables
22.1 TABLES 22.2 LINE GRAPHS 22.3 BAR CHARTS 22.4 PIE CHARTS 22.5 CUMULATIVE FREQUENCY GRAPHS 22.6 HISTOGRAMS 22.7 BOX AND WHISKERS
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Chapter 22.0:  Learning Outcomes Students will be introduced to the different ways to present data!

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