O r g a n i s i n g a n d d i s p l a y i n g d a t a :
Data means a collection of facts or raw information. Data can be organised and displayed in avariety of
ways so that we can analyse (study) them in more detail.
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Some common examples:
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Column graph
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Sector graph
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Divided bar graph
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Mostly used for data that are in categories
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Uses columns to show the quantity or frequency of each category
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Also called a ‘bar chart’
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The horizontal axis (going across) shows the categories
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The vertical axis (going up) shows the frequency
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Shows parts of a whole in circle form
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Uses sectors of a circle to show sizes of parts
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Also called a ‘pie chart’ or ‘circle graph
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Shows parts of a whole in rectangular form
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Uses sections of a rectangle to show sizes of parts
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F r e q u e n c y t a b l e s :
Frequency tables are constructed by arranging collected data in ascending order with their corresponding frequencies
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So, a particular data value and then the number of times it occurs (frequency)
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You can then go on to find the mean, mode, median and range of a frequency table.
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Ex.
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= 5
T y p e s o f d a t a :
Statistical data may be in the form of categories or in the form of numbers
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These are of the two types of data:
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Categorical:
Words that can be grouped into categories (eg. Phone company's or hair colours)
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Numerical:
(or quantitative data) are numbers which are describing things that can be counted or measured (eg. The number of goals scored
in a basketball match or someone's height)
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Chapter 7: Statistics & Data .
Tuesday, 12 October 2021
5:37 PM
