Supply and demand
Shift demand and predict the new price.
Why bigger samples are steadier
Drag the sample size and watch averages settle.
Try it
Takes about 1 minute.
The problem
Students memorize "bigger samples are better" without seeing why.
Who it's for
Statistics and research methods modules, across subjects
Before and after
See how we make a difference
Before
As it usually is
- A formula for the standard error.
- A worked example with numbers to copy.
After
Redesigned
- Change 1: Students drag the sample size themselves.
- Change 2: Each dot is one sample's average, so the spread is visible.
- Change 3: The spread figure updates as they move.
- Reason for change 1: Students see it happen instead of taking it on trust.
- Reason for change 2: One picture links the idea and the number.
- Reason for change 3: Moving the slider invites them to test their own guesses.
How we'd build this for you
Watch an idea happen, not just the formula
This activity is one example of a pattern that works in almost any subject. Here's how the same idea could look in yours.
- PsychologyRun a small experiment many times and see why one result can mislead.
- MedicineChange a test's accuracy and see how many false alarms a screening program gives.
- Quality controlSample products from a line and see when a fault would be caught.
- PoliticsChange the size of a poll and see how often it calls the wrong winner.
- EcologyCount birds in random patches and see how close the estimate gets.
We build it with your subject experts and your own examples, in your learning platform. Every piece works on phones, by keyboard and with screen readers.
Free to use
Use it in your teaching
Add this activity to your own course or training, free, with credit to ApexID.
Related projects
Try another one
Keep a dose in the safe range
Choose the timing, see the result. (Fictional drug.)
Balance the beam
Slide the weight until both sides match.
Portfolio projects made by ApexID to show the kinds of interactive learning we build. Not client projects.