Review set
Sampling variability and standard error
The questions ask you to say what a standard error describes and to notice when the data are not the independent observations a formula assumes. The arithmetic returns easily; the habit of counting rows instead of independent units is what needs unlearning.
What this involves
Retrieval after a delay, which is what makes knowledge durable.
Answers here count towards what the system knows about your skills.
What this covers
- Reason about the sampling distribution of an estimator
Given a described sampling situation, the learner can obtain the standard error of a mean, say what the central limit theorem does and does not claim, and identify when the independence the formula assumes fails.