Question

If a median and mean deviation about median for the data are 4 and 3.85 respectively, then Coefficient of Mean Deviation is​

Answer 1

Answer:

Correct answer is

0.2

Step-by-step explanation:

Arrange the given observations in ascending order

40,54,62,68,76,90

Here, number of terms n=6(even)

∴ Median (M) = 2( 2n)th term+( 2n+1)th term= 262+68=65

Σ∣x i−M∣=25+11+3+3+11+25=78

Mean deviation from median = nΣ∣x i −M∣ = 67 =13

∴ Coefficient of M.D.==

median

M.D. = 65/13

=0.2