Subjects › Probability & Statistics
Sampling and inference
Sampling error, confidence intervals, and what a p-value does not mean.
The idea
Almost every learner's first definition of a p-value and of a confidence interval is the Bayesian one they wish were true. Naming the wrong version explicitly works better than only stating the right one.
Lesson
No lesson built yet. The worked solutions below are the material it would be assembled from.
Questions (3)
| Question | Type | Difficulty | Drift | Accuracy |
|---|---|---|---|---|
| A poll reports 52% support with a margin of error of ±3 percentage points at 95% confidence. What does this me… | mcq | Hard 0.90 | — | — (0) |
| A study reports p = 0.03. State what this does and does not tell you. | short | Very hard 1.50 | — | — (0) |
| To halve the margin of error of a survey, roughly what must happen to the sample size? | mcq | Hard 1.10 | — | — (0) |