Question

23. Compute the Arithmetic Mean by assumed
mean method for the following data
Mark obtained
0-10
10-20
20-30
30-40
40-50
50-60
Number of students
14
8
15
21
9
8
​

Answer 1

Answer:

the answer is as follows:

Step-by-step explanation:

Let the assumed mean be A=35

MarksMid-value

    (x)No. of students

       (f)d=x−35fd0−10

10−20

20−30

30−40

40−50

50−60 5

15

25

35

45

55 5

10

25

30

20

10−30

−20

−10

  0

 10

 20−150

−200

−250

   0

 200

 200∑f=100∑fd=−200x=A+∑f∑fd

     =35+(100−200)=35−2=33

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