Mean Deviation

Q.

Why standard deviation is important?

Q.

Find out the mean height from the following data relating to height measurements of 8 persons in centimeters.

$\begin{array}{cccccccc}159& 161& 163& 165& 167& 169& 171& 173\end{array}$

Q. A batsman scores runs in 10 innings as $38,70,48,34,42,55,63,46,54,44$. The mean deviation about mean is :

1. $6.4$
2. $8.6$
3. $10.6$
4. $7.6$

Q. ______ is called as half of the difference between upper and lower quartiles.

1. Standard deviation
2. Mean deviation
3. Quartile deviation
4. Interquartile range

Q. For the data set $\{10,12,40,35,14,24,13,21,42,30\}$, find the mean absolute deviation to the nearest hundredth.

1. $9.12$
2. $11.12$
3. $12.12$
4. $10.12$