Question

Find the
mean of the following data using direct method
C.I
15-25
25-35
35-45
45-55
55-65
65-75
F
6
11
7
4
4
2
​find it by assumed mean method
pls ​

Answer 1

Answer:

mean= 38.529

Step-by-step explanation:

I hope it's helpful for you

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Answer 2

Answer:

41.47 approximately

Step-by-step explanation:

___________________________

C.I F X d= xi-a fidi ___________________________

15-25 6 20 -30 -180

25-35 11 30 -20 -220

35-45 7 40 -10 -70

45-55 4 50=A 0 0

55-65 4 60 10 40

65-75 2 70 20 40

___________________________

£fi= 34 £fidi= -290

mean = A + £fidi / £fi

= 50 + (-290/34)

= 50-8.53

= 41.47 approximately