Question

the table below shows daily expenditure on food of 25 household in a locality. find the median class of given data.​

Answer 1

Correct Question :- the table below shows daily expenditure on food of 25 household in a locality. find the mean class of given data.

Given :-

Daily expenditure (in Rs) :- 100 - 150 150 - 200 200 - 250 250 - 300 300 - 350

Number of households :- 4 5 12 2 2 .

To Find :-

• Mean of class ?

Solution :-

fi xi di ui fiui

100 − 150 4 125 -100 -2 -8

150 − 200 4 175 -50 -1 -5

200 − 250 4 225 0 0 0

250 − 300 4 275 50 1 2

300 − 350 4 325 100 2 4

Total :- 25 -7

from data we get :-

• a = 225
• h = 50
• sum of fi*ui = (-7)
• sum of fi = 25

Mean :-

• a + (sum of fi * ui /sum of fi ) * h

Putting all values we get,

→ Mean = 225 + (-7/25)*50

→ Mean = 225 + (-7) * 2

→ Mean = 225 - 14

→ Mean = 211. (Ans.)

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