1 / 1 Assignment – 1 1. Find the Mean for the following: Marks 0-10 10-20 20-30 30-40 40-50 No of students 20 24 40 36 20
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Answered by
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Answer:
40-50
45
20
900
mean =
∑f
∑fx
=
140
3620
=25.857
Assumed mean method
size
x
u=x-25
f
uf
0-10
5
-20
20
-400
10-20
15
-10
24
-240
20-30
25
0
40
0
30-40
35
10
36
360
40-50
45
20
20
400
mean =A+
∑f
∑fu
=25+
140
120
=25.875
Step deviation method
size
x
d=x-25
u=(x-25) / 10
f
uf
0-10
5
-20
-2
20
-40
10-20
15
-10
-1
24
-24
20-30
25
0
0
40
0
30-40
35
10
1
36
36
40-50
45
20
2
20
40
mean =A+h×
∑f
∑fu
=25+10×
140
12
=25.875
Answer ByavatarToppr
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