## Tuesday, March 29, 2011

### Data Handling (Pie Chart)

PIE CHART
source: Worksheet 16.1 Q2

The Pie Chart below represents the traffic condition outside SST at 7.25 am on a typical morning.
(a) Find the angle of the sector representing motorcycle to the nearest degree.
(b) Find the percentage of sector representing cars, correct your answer to 3 significant figures.
(c) Is it possible to present the above information using line graph? Justify your answer.

courtesy of Ms LohKY
edited by Mr Johari

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4. (a) 28˚
(b) 69.2%
(c) No, it cannot. Line graphs can only be used to show the increase or decrease of objects. If the number is a constant, it cannot be presented in a line graph.

5. 28˚
69.2%
No, line graph is used to measure differences in the same thing, but there is no difference or trend in this one

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7. a)28 degrees
b)69%
c)no.as it will show information that is not provided

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9. a)28˚
b)69.2%
c)No.Line graphs are plotted based on information collected over a period of time. This pie graph only has information collected at one point of time.

10. 28˚
69.2˚
No, the line graph can only be used when there are two factors competing with each other.

11. (a) 28º
(b) 69.2%
(c) No it cannot. A line graph shows a trend; the increase and decrease rate of the data collected.

12. a) 28˚
b) 69.2%
c) No it is not possible. A line graph is usually used to measure and present trends between several items. In this case, it is not possible as there is not increase or decrease in the data collected, only the number of vehicles.

13. a)28º
b)69.2
c)No,it is not possible.A line graph can only show decrease,increase or constant.Since there is no increase,decrease or constant a line graph would not be appropriate for the information

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15. (a) 28º
(b) 69.2
(c) No, line graphs are used to show data collected over a period of time. This pie graph only has information collected at one point of time.

16. (a) 28º
(b) 69.2º
(c) No because this only shows the numbers of the different kind of vehicles at that point of time and you cannot see the increase or decrease of the different kind of vehicles at different point of time.

17. a) 28º
b) 69.2%
c) no, it is impossible because line graph is used to calculate statistics over certain period of time.

18. a)28 degrees
b)69.2%
c) Not it is not possible as a line graph can only show changes in the data. Since there is no changes, it is not possible to use a line graph to collate the above data

19. a) 28º
b) 69.2%
c) No. It is because a line graph shows the increase, constant and decrease rate of the data.

20. a)28˚
b)69.2%
c)No, it is not. Line graphs are only used to measure something over a period of time.

21. a)28˚
b)69.2%
c) No, it is not possible as line graphs are more for measuring a certain object's characteristic over a period of time and so using a line graph for this piece of information would be inappropriate.

22. a) 28˚
b) 69.2%
c) No. line graphs are used to show something over a period of time but this graph has information only for that period of time.

23. 28º
69.2%
No.A line graph is used to show the increase or decrease pattern of a single object

24. (a) 28˚
(b) 69.2%
(c) No. Line graph is only used to show the difference over a period of time.

25. (a)28°
(b)69.2%
(c)No, the line graph represents information collected over a period of time while the information showed here is of a specific timing.

26. (a) 28º
(b) 69.2%
(c) No. Line Graphs are used to represent an amount changing over a period of time.

27. a) 28˚
b) 69.2%
c) No. Line graphs are used to measure data that was collected over a period of time. Hence, it will not be appropriate to use a line graph.

28. a) 27.69...~~~ 28 degrees
b) 9/13x100=69.230...~~~69.2%
c) no....line graphs are used to compare incline and decline of the SAME thing...it cant be used here