Question

The heights of 9 persons are 142 cm, 158 cm, 152 cm, 143 cm, 139 cm, 144 cm, 146 cm, 148 cm and 151 cm. Find the mean height. 

Answer 1

The heights are: 
142 cm, 158 cm, 152 cm, 143 cm, 139 cm, 144 cm, 146 cm, 148 cm, 151 cm 
n=9 

`barx = (x_1 + x_2 + x_3 + .... + x_n)/n`

`barx = (142 + 158 + 152 + 143 + 139 + 144 + 146 + 148 + 151 )/9`

`barx = 1323/9`

`barx = 147  "cm" `

The mean height = 147 cm