# Statistical graphs

Teachers can now add statistical graphs to a short-answer question type and ask students to answer by interacting with the dynamic graph. The following statistical representations are available: bar chart, line chart and pie chart.
All statistical charts designed within Wiris Quizzes are interactive and customizable, and our software system automatically evaluates assessments with graphical statistical questions.

#### Wiris Quizzes 4 feature

This feature is only available for Wiris Quizzes 4. You can see all the changes the tool undergoes here.

A bar chart is a diagram in which the numerical values of variables are represented by the height or length of lines or rectangles of equal width. This type of graphical representation is now supported by Wiris Quizzes. Instructors can now create dynamic bar charts as initial content and ask the students to answer questions by interacting with the chart.

### Bar chart toolbar

You will now be able to add and edit bars but also packs to each bar.

#### Vertical and horizontal orientation

Alter the orientation of your bar graph, from vertical to horizontal.

With the add packs button, you will be able to add as many packs of bars as you wish and label them individually with the tag you consider.

#### Add groups to bar packs

With the add groups button, you will be able to add as many groups as you wish to the bar packs. These groups will automatically appear in different colours.

#### Groups positioning

Alter the positioning of your bar graph groups, from stacked to grouped.

#### Delete groups

Delete a group by clicking on delete group on the lower toolbar menu. This option does not delete packs of bars.

#### Delete bar packs

Delete an entire bar pack by clicking on the delete pack button on the lower toolbar menu. This option will also delete all packs included in the bar group.

A line chart or line plot or line graph or curve chart displays information as a series of data points called 'markers' connected by straight line segments. It's a primary type of chart typical in many fields. This type of graphical representation is now supported by Wiris Quizzes. Instructors can now create dynamic line charts as initial content and ask the students to answer questions by interacting with the chart.

### Line chart toolbar

You will now be able to add and edit lines, but also line points.

#### Vertical and horizontal orientation

Alter the orientation of your line graph, from vertical to horizontal, with the orientation button.

With the add group of points, you will be able to add as many groups of points as you wish within the same lines you’ve established and label them individually with the tag you consider.

With the add lines, you will be able to add as many lines as you wish to the line groups. With the add line button, you’ll add as many group points as established previously in the other lines.

#### Delete lines

Delete a full line of points by clicking on the delete line button on the lower toolbar menu. This option will not delete a full group of points/labels.

#### Delete group of points

Delete a group of points by clicking on the delete points button on the lower toolbar menu. This option will delete the full group of points, hence the entire label.

A pie chart is a circular statistical graphic divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each piece is proportional to the quantity it represents. This type of graphical representation is now supported by Wiris Quizzes. Instructors can now create dynamic pie charts as initial content and ask the students by interacting with the chart.

### Pie chart toolbar

You will now be able to add and edit pie sections.