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Presentation of Data
The table below gives the ages of drivers of cars involved in total accidents during a certain year. Draw a pie-chart to represent the data.
|
Age of drivers |
Percent of total |
|
Under 20 |
15 |
|
20 – 40 |
60 |
|
40 – 60 |
20 |
|
Over 60 |
5 |
|
Total |
100 |
|
Ages |
%age Total. |
Degrees |
|
|
under 20 (A) |
15 |
15 × 3.6 |
= 54 |
|
20 – 40(B) |
60 |
0 × 3.6 |
= 216 |
|
40 – 60 (C) |
20 |
0 × 3.6 |
= 72 |
|
over 60(D) |
5 |
6 × 3.6 = |
18 |
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Bar diagram is a:
Data represented through a histogram can help in finding graphically the:
Ogives can be helpful in locating graphically the:
Data represented through arithmetic line graph help in understanding:
Width of bars in a bar diagram need not be equal.
Width of rectangles in a histogram should essentially be equal.
Histogram can only be formed with continuous classification of data.
Histogram and column diagram are the same method of presentaton of data.
Mode of a frequency distribution can be known graphically with the help of histogram.
Median of a frequency distribution cannot be known from the ogives.
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