Math, asked by ranamariyam1234, 10 months ago

Plz solve this ..it’s really urgent

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Answers

Answered by saimshere
1

Answer:

Step-by-step explanation:

C-I             (f)     (x)        d = (x-A)         d' =  d/i                d'(f)

0-10           5       5              -20             -20/10 = -2          -2 x 5 = -10

10-20        10      15              -10             -10/10  =  -1          -1 x 10 = -10

20-30       18      25               0               0/10   =  0           0 x 18 = 0

30-40       30     35               10              10/10  =  1            1 x 30 = 30

40-50       20     45               20             20/10 = 2           2 x 20 = 40

50-60       12      55               30             30/10 =  3          3 x 12  = 36

60-70        5       65              40              40/10 = 4           4 x 5 = 20

          ∑f = 100                                                                   ∑d'f = 106

illustration:

x = mid values of C.I i-e, 0+10/2 = 5 and so on.

A = assumed mean, I took A=25 above.

Hence d= (x-A) => 5-25 = -20 and so on.

i = Interval gap which is 10. i-e 0-10, 10-20 and so on.

Step-2:

Step Deviation Formula:

  x (bar) =  A + ∑d'f / ∑f x i  

 

     x(bar) =  25 + 106/100 x 10

     x(bar) = 178/5

     x(bar) = 35.6 ≅ 36  ( Answer )

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