First slide

Introduction to statistics

Question

The variance of the scores 2, 4, 6, 8 and 10 is

Moderate

A

2
B

4
C

6
D

8

Solution

Clearly,
$Variance = \frac{1}{5} (2^{2} + 4^{2} + 6^{2} + 8^{2} + 10^{2}) - {(\frac{2 + 4 + 6 + 8 + 10}{5})}^{2}$
$\Rightarrow Variance = \frac{4 \times 55}{5} - 36 = 8$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App