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Use Graph Paper for this Question. the Table Given Below Shows the Monthly Wages of Some Factory Workers (I) Using the Table, Calculate the Cumulative Frequencies of Workers ( - Mathematics

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Use graph paper for this question.
The table given below shows the monthly wages of some factory workers
(i) Using the table, calculate the cumulative frequencies of workers
(ii) Draw a cumulative frequency curve.
Use 2 cm = ₹ 500, starting the origin at ₹ 6500 on x-axis, and 2 cm = 10 workers on the y – axis. 

Wages (in Rs) 6500-7000 7000-7500 7500-8000 8000-8500 8500-9000 9000-9500 9500-10000
No of workers 10 18 22 25 17 10 8
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Solution

Wages No. of workers  c.f. 
6500-7000  10 10
7000-7500 18 28
7500-8000 22 50
8000-8500 25 75
8500-9000 17 92
9000-9500 10 102
9500-10000 8 110 

Total = 110
Now plot the points (7000,10), (7500,28), (8000,50), (8500,75), (9000,92), (9500,102) and (10000,110) and join them to obtain an ogive. 

Concept: Finding the Median, upper quartile, lower quartile from the Ogive
  Is there an error in this question or solution?

APPEARS IN

Selina Concise Maths Class 10 ICSE
Chapter 23 Graphical Representation
Exercise 23 | Q 7 | Page 349
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