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Question

The monthly income of a group of 320 employees in a company is given below:

Monthly income
6000-7000 7000-8000 8000-9000 9000-10000 10000-11000 11000-12000 12000-13000
No of employees
20 45 65 95 60 30 5



Calculate:


(i) Median wage


(ii) Number of employees whose income is below Rs. 8500


(iii) Number of senior employees in the company


(iv) Upper quartile



[4 MARKS]

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Solution

Each Part: 1 Mark


i) Median wage =n2th term==320th2 term=160th term=Rs.9300

ii) The number of employees whose income is below Rs. 8500 = 90

iii) Number of senior employees in the company = 320 - 300 = 20

iv) Upper quartile =3nth4 term=3×320th4 term=240th term=Rs.10,300


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