Question

if quartile deviation of give set of data of 20 observations is 12,then value of standard deviation is

Answer 1

Answer:

Standard deviation of the given set of data is 18

Step-by-step explanation:

Given in the question that,

number of observations = 20

Quartile deviation of a given set of data = 12

To find standard deviation we will use following formula

Q.D. = (2/3) σ

here σ is standard deviation

Plug values in the formula above

12 = (2/3) σ

σ = 12 x 3/2

σ = 18