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Ra Representing Data Discrete Data ; These are results gathered by counting things in whole numbers Eg the different colours of cars that were cleaned in a car wash in one day When we gather the information we would probably use a table using tally charts to count Lets see the results from ‘Dave’s Car Wash’ on Sunday
2.
Dave’s Sunday Car Wash This data is in a table so it might be said to be in tabulated form And it is sometimes known as a ‘frequency table’ or ‘Tally chart’ White Cars Black Cars Blue Cars Red Cars Green Cars Yellow Cars
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Dave’s Sunday Car Wash This data is in a table so it might be said to be in tabulated form And it is sometimes known as a ‘frequency table’ 20 5 10 5 10 10 White Cars Black Cars Blue Cars Red Cars Green Cars Yellow Cars
It is sometimes easier to calculate what fraction of the whole count can be given to each result. If this is the fraction of a circle, then the result can be shown on a pie chart.
In our example 20 out of sixty cars were white so 20/60 or 1/3 were white
Now 1/3 x 360 degrees= 120 degrees
6.
A pie chart showing cars at Dave’s car wash x White Cars Blue cars Yellow Cars Green Cars Black cars Red cars
From Dave’s car wash we cannot see anything very special about the data
Perhaps only that white seems to be twice as popular than any other colour (this is shown by the largest slice in the pie chart and the highest bar in the bar graph)
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