Statistics
Mean Deviation from Mean
nta_pyq_2023_apr
Grade 11
Question:
For data $1,2,4,5,x,y$ with mean 5 and variance 10, the mean deviation about the mean is
Step-by-Step Solution
Key Concept: $x+y=18$ and $x^2+y^2=164\Rightarrow x=10,y=8$.
$x=10,y=8$. M.D $=\frac{8}{3}$.
Correct Answer: 3