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Question

Find the mean number of leaves per tree using step deviation method.
453142.png
  1. 10.4
  2. 11
  3. 12
  4. 13

A
10.4
B
11
C
12
D
13
Solution
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Answer:-
Class interval width (i) = 4
No. of leaves
X No. of trees
F
u=XAi Fu
0-4 2 10 -1 -10
4-8 6 = A 20 0 -0
8-12 10 301 30
12-16 14 40 2 80
Σf=100 Σfu=110
Mean = A+ΣfuΣf=6+110100×4=6+4=10.4
10.4 leaves

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