Let the assumed mean (A) = 4
No. of branches (xi) |
No. of plants (fi) |
ui = xi - A = xi - 4 |
fiui |
2 |
49 |
-2 |
-98 |
3 |
43 |
-1 |
-43 |
4 |
57 |
0 |
0 |
5 |
38 |
1 |
38 |
6 |
13 |
2 |
26 |
|
N = 200 |
|
\(\sum\)fiui = -77 |
Average number of branches per plant = A + \(\frac{\sum fiui}{N}\)
\(=4+\frac{-77}{200}=\frac{800-77}{200}\)
\(=3.62\) (approx.)