Use the assumed-mean method to find the mean height of the plants from the following frequency-distribution table. Height in cm (x i ) 61 64 67 70 73 No. of plants (f i ) 5 18 42 27 8

Question

Philoid · Accepted Answer

Let the assumed mean be A = 67

So, we arrange the given data as under :

Height (in cm) (x_i)	No. of plants (f_i)	=d_i = x_i - A	= d_i × f_i
61	5	-6	-30
64	18	-3	-54
67	42	0	0
70	27	3	81
73	8	6	48
	∑f_i = 100		∑x_if_i = 45

We know,

Mean =

Hence, The mean height of the plants = 67.45 cm.

Use the assumed-mean method to find the mean height of the plants from the following frequency-distribution table.Height in cm (xi)6164677073No. of plants (fi)51842278

Use the assumed-mean method to find the mean height of the plants from the following frequency-distribution table.

Height in cm (x_i)

61

64

67

70

73

No. of plants (f_i)

5

18

42

27

8