EXD.2:8 - Common Anti-Patterns and How to Avoid Them

Failure	Repair
Using only equal-sized groups to teach why counts matter	Add an unequal-count, unequal-mean case that distinguishes the competing rules.
Treating one correct number as evidence of the correct relation	Ask how the quantities correspond and use a discriminating changed case.
Asking for free explanation when a required component is unavailable	Supply the missing component or worked correspondence, then inspect the affected use.
Extending an analogy through surface resemblance	State the supported relation and the consequential non-correspondence.