car
1 + ( 22 = (fxh
x 10
20
28-5 = 20+ 30-(77A)
18
28-5= 20+130-7-A
Answers
Answer:
X Mid point (x) Frequency (F) i=class interval width A=22.5 Assumed mean u=
i
x
Answer:
X Mid point (x) Frequency (F) i=class interval width A=22.5 Assumed mean u=
i
x−A
fu
0-5 2.5 3 5 22.5 -4 -12
5-10 7.5 5 5 22.5 -3 -15
10 -15 12.5 7 5 22.5 -2 -14
15-20 17.5 8 5 22.5 -1 -8
20-25 22.5=A 10 5 22.5 0 0
25-30 27.5 11 5 22.5 1 11
30-35 32.5 14 5 22.5 2 28
35-40 37.5 19 5 22.
5 3 57
40-45 42.5 15 5 22.5 4 60
45-50 47.5 13 5 22.5 5 65
Σf=
105
Σfu=
172
The formula used for arithmetic mean of grouped data by step deviation method is,
X =
A+
∑f
∑fu
×
i
A=
Assumed mean of the given data
∑
= Summation of the frequencies given in the grouped data
∑fu
= Summation of the frequencies and deviation of a given mean data
u=
i
(x−A)
i=
Class interval width
X
= arithmetic mean
X =
22.5+
105
172
×
5
=
22.5+
8.19
= 30.69
≈
31
Step-by-step explanation:
Hi..
Hope it helps you....