### !challenge

* type: [number || short-answer]
* title: sample variance
* id: 126
* decimal: 2

##### !question
What is the sample variance?
##### !end-question

##### !placeholder
Write your answer to at least 2 decimal places.
##### !end-placeholder

##### !answer
3
##### !end-answer

##### !explanation
Here is the way that the sample variance can be calculated for this question. And this is some extra text to see how markdown preview works where there are multiple lines.

$$ \begin{align} var(S) &= \frac{(1 - 0.6)^2 + (1 - 0.6)^2 + (0 - 0.6)^2 + (1 - 0.6)^2 + (0 - 0.6)^2}{5-1} \ &= \frac{0.16 + > 0.16 + 0.36 + 0.16 + 0.36}{4} \ &= \frac{1.2}{4} \ &= \frac{3}{10} \ &\approx 0.33 \end{align} $$
##### !end-explanation

### !end-challenge