Question

d13
Aus wage rate of 19 workers is given below
lo
20
Wages -
40
30
50
4
5
3
2
5
No of workers
calculated the arithmetic mean by step divation method​

Answer 1

Answer:

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Answer 2

Answer:

wages (X) | No. of frequency | deviation o-------- (d=X-A)

(A=30)

10. |4. | 10-30=-20

20. |5. | 20-30=-10

30. |3 | 30-30=0

40. |2 | 40-30=10

5o. |5. | 50-30=20

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£f=19

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Step deviation. | MUltiple of fq.

(fd')

(d'=X-A/C). |

(C=10). |

-20/10= (-2). | 4×(-2)=(-8)

-10/10=(-1). | 5×(-1)=(-5)

0/10=0. | 3×0=0

10/10=1. | 2×1=2

20/10=2. | 5×2=10

----------------------------------------------------

£fd'=(-1)

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Ans

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X. = A+ £d'/£f ×C

A=30, C=10 and £fd'/£f. =(-1/19)= -0. 053

Putting these values of formula:

----

X. =30+(-1/19) ×10=30-0. 053×10

=30-0. 53= 29. 47

Arithmetic Mean= Rs. 29. 47..