Following is the height of 10 students.
Students
A B C D E F G H I J
height 155 153 168 160 162 166 164 180 157 165
calculate arithmetic mean
using
Direct & Short cut method
Answers
Answered by
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Explanation:
Following is the height of 10 students:
Students
A
B
C
D
E
F
G
H
I
J
Height (cm)
155
153
168
160
162
166
164
180
157
165
Calculate arithmetic mean by using direct and short cut method.
Answer
(a) Calculation of arithmetic mean by direct method:
Students
Height (c.m.)
A
B
C
D
E
F
G
H
I
J
155
153
168
160
162
166
164
180
157
165
N= 10
Σ = 1630
(b) Calculation of arithmetic mean by indirect method :
Students
Height (c.m.)
X
d
(X-)
A
B
C
D
E
F
G
H
I
J
N= 10
155
153
168
160
162
166
164
180
157
165
-5
-7
+ 8
+ 0
+ 2
+ 6
+ 4
+ 20
-3
+ 5
Σ d = 30
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