Question

The following figure are the heights of in centimetres of 7 children calculate Arithmetic mean by direct method:- 64,59,67,69,65,70,68​

Answer 1

Answer:

Data points:

 Xi =   64,59,67,69,65,70,68​

∑Xi = 462

n = 7

mean = ∑Xi / n

          = 462/7

          = 66 cm

Answer 2

Answer:Calculating the average using direct method:

Average (X)=

ΣX

N

or, X =

2+3+5+6+8+10+11+13+17+20

10

or, X =

95

10

⇒X=9.5

Hence, the average of the above individual data is 9.5

Explanation: