Question

the height of 72 plants in a
garden are given below
Height of incm) 58/60/62/64 66 68
No. of plant 12/14/20/13/8/5/​

Answer 1

Answer:

The mean height of plant is 62.17 cm.

Explanation:

The complete quiestion:

The height of 72 plants in a garden are given below. Make two columns in height and no of plants

Height (in cm) :58 60 62 64 66 68

Number of plants : 12 14 20 13 08 05

Find the mean height.

We know that,

Mean = \dfrac{f_{1}x_{1}+f_{2}x_{2}+f_{3}x_{3}+.......}{f_{1}+f_{2}+f_{3}+..... }

f

1

+f

2

+f

3

+.....

f

1

x

1

+f

2

x

2

+f

3

x

3

+.......

= \dfrac{58\times 12+60\times 14+62\times 20+64\times 13+66\times 8+68\times 5}{12+14+20+13+8+5}

12+14+20+13+8+5

58×12+60×14+62×20+64×13+66×8+68×5

= \dfrac{4476}{72}

72

4476

= 62.17 cm

∴ The mean height of plant = 62.17 cm

Thus, the mean height of plant is 62.17 cm.