Answer the following:
9. Convert the following table into continuous form by writing the boundaries
C.I 10-19 19-29 30-39
Frequency 5 22 13
10. For which of these would you use a histogram and a bar graph? Identify:
a) The weight of participants in a competition
b) The number of 100 marks got by 6 students in a test.
11. A persons wage is Rs. 1200 and his expenses on travel are Rs. 125. The central angel of a sector representing travel expenses in the pie-chart would be:
Answers
Given : Question related to Bar graph , class interval & pie chart
To find : continuous class , central angel of a sector representing travel expenses
Solution:
Correction in Question :
C.I 10-19 20-29 30-39
Frequency 5 22 13
Class interval in continues form
Class Frequency
9.5 - 19.5 5
19.5 - 29.5 22
29.5 - 39.5 13
The weight of participants in a competition
Range would be narrow and participants would be more - Continuous data would be available
can be shown by histogram
The number of 100 marks got by 6 students in a test. - here range is too high & total frequency is just 6 - Bar graph would be suitable showing marks of each students
Wages = complete circle = 360°
central angel of a sector representing travel expenses = (125/1200) * 360 = 37.5°
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