# Identify Outliers

## Interactive practice questions

Identify the outlier(s) in the data set $\left\{73,77,81,86,131\right\}${73,77,81,86,131}.

Easy
Less than a minute

The marks achieved by students in a class on a particular math exam were: $69,79,86,72,86,77,73,82,81,76,83,47,87,70,80,85$69,79,86,72,86,77,73,82,81,76,83,47,87,70,80,85.

Identify the outlier(s).

The marks achieved by students in a class on a particular math exam were: $58,63,58,59,64,68,68,30,73,25,72,61,65,69,75,72$58,63,58,59,64,68,68,30,73,25,72,61,65,69,75,72.

The graph shows the annual net profit (in millions) of a company over a several year period. Identify the year in which the annual net profit is an outlier.

### Outcomes

#### S5-1

Plan and conduct surveys and experiments using the statistical enquiry cycle:– determining appropriate variables and measures;– considering sources of variation;– gathering and cleaning data;– using multiple displays, and re-categorising data to find patterns, variations, relationships, and trends in multivariate data sets;– comparing sample distributions visually, using measures of centre, spread, and proportion;– presenting a report of findings