Calculating mean from the following table?
Income 0-10 10-20 20-30 30-40 40-50
No of person 6 14 20 7 3
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Step-by-step explanation:
Class. Interval frequency. (fi)Mid value fixi
0-10. 12 5 60
10-20 16 15. 240
20-30 6. 25 150
30-40 7. 35 245
40-50 9 45 405
N=∑fi=50
∑fixi=1100
∴Mean= ∑f/∑fix = 1100/50
=22
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0-10 12 5 60 10-20 16 15 240 20-30 6 25 150 30-40 7 35 245 40-50 9 45 405
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