Question

Prepare a univariate
for the following dala
fuquency distribution
35,92,27,43,33,75,5,12,90,88, 70, 43,9,5946,27,88,22,77,56,38,10,12,20,5,94,90,70,22,30, 50, 70, 40​

Answer 1

Answer:

To find the class mark (xi) for each interval, the following relation is used.

Class mark = + /

xi and fixi can be calculated as follows.

Number of plants number of houses xi fixi

0 – 2 1 1 1

2 – 4 2 3 2 x 3 = 6

4 – 6 1 5 1 x 5 = 5

6 – 8 5 7 5 x 7 = 35

8 – 10 6 9 6 x 9 = 54

10 – 12 2 11 2 x 11 = 22

12 – 14 3 13 3 x13 = 39

Total 20 162

From the table, it can be observed that

∑fi = 20

∑fixi = 162

Statistics- Exercise 14.1 – Class 10

= 162/20 = 8.1

Therefore, mean number of plants per house is 8.1.

Here, direct method has been used as the values of class marks (xi) and fi are small