Demos

Two sample t-test to see if there is a difference between scores on questions between two groups when the questions are asked in a different order.

No description given

A demonstration of the random person extension, which picks representative names of people.

An exam set up to produce printed worksheets.

This question shows how to use the JSXGraph extension to show the student a plot of a function that they enter.

In the first part, the student enters an expression for $f(x)$. Once they've done that, they can reveal a plot of the function.

This question demonstrates how to plot a graph of a function using JSXGraph.

A demo of the "quantities with units" extension and custom part type.

The student is shown a Cartesian diagram containing a point $P$ and a circle. They must move the point and change its radius so that the point $P$ is touching the circle.

They can type the radius and coordinates in, or move the circle around on the diagram.

The student is shown a diagram containing a single point at the origin. They must move the point to the given integer coordinates.

A 2D linear programming problem: optimise the profit from producing two different kinds of product, which both use the same limited resources.

A JSXGraph diagram illustrates the problem and can be used to find an answer.

The student is shown a diagram containing a line between two points. They're given a gradient and $y$-intercept.

They must manipulate the line or the points so that the line has the given gradient and $y$-intercept.

The student must make a spanning tree of the complete graph $K_5$. They can tick boxes to include or exclude edges, or toggle them by clicking on a visual representation of the graph.

Customised for the Numbas demo exam

Motion under gravity. Object is projected vertically with initial velocity $V\;m/s$. Find time to maximum height and the maximum height. Now includes an interactive plot.

A demo of the mathematical expression part and its options.

A demo of the gap-fill part and its options.

Showing off the part types.

A demonstration of the exam-level variable override feature. The student is shown the same question several times, but each instance is set up to suggest a different error in the process of computing the median of a sample. The first instance is very easy, and the last is pretty hard.

A few questions showing how to use custom constants in different contexts.

In this question, the imaginary unit $\sqrt{-1}$ is written as $j$ instead of $i$.

The letters i, j and k are used to represent the standard 3D unit vectors.

In this question, $\tau$ represents the ratio of a circle's radius to its circumference, or $2\pi$.

The student is shown a GeoGebra worksheet containing a single point on a grid. They must move the point to the required coordinates.

The part is marked as correct if the point is in the right position.

A demo of the choose several from a list part and its options.

A demo of the match choices with answers part and its options.

A demo of the match text pattern part and its options.

No description given

Find a regression equation.

Now includes a graph of the regression line and another interactive graph gives users the opportunity to move the regression line around. Could be used for allowing users to experiment with what they think the line should be and see how this compares with the calculated line.

Also includes an updated SSE to see how the sum of the squares of the residuals varies with the regression line.

This question demonstrates how to use the "Download a text file" extension to create a link to download a file containing text created from question variables.

This question shows how to load a GeoGebra applet from geogebra.org.