Question

Question

Answer 1

Answer:

Variance is 256

Step-by-step explanation:

Variance:

$var = \frac{ ({ \sum x})^{2} }{n} - {( \frac{ \sum x}{n} })^{2}$

x is the number or item in the data

n is the number of terms

${ \tt{ \sum x = (12 + 7 + 6 + 4 + 11)}} \\ { \tt{ \sum x = 40}}$

Therefore:

$variance = \frac{ {40}^{2} }{5} - { (\frac{40}{5}) }^{2} \\ \\ = 320 - 64 \\ variance = 256$