Skip to main content

Courses About Pricing Educators

Sign in Get started

Courses About Pricing Educators

Get started Sign in

Loading courses

Loading lessons

Samples and Surveys: Probability & Statistics: Uncharted

Courses Probability & StatisticsSamples and Surveys

Samples and Surveys

Design representative samples, diagnose survey bias, and reason about sample-to-sample variability.

Probability & Statistics
Unit 8 of 12
20 lessons
148 min
420 XP

Every lesson is open. Sign in when you are ready to begin.

Sign in to start

Lessons

20 total

1Taste the SoupExplain how a well-mixed sample can represent a larger population.InteractiveConcept7 min20 XPOpen
2Who Are You AskingDistinguish a target population from the sampling frame that can actually be reached.InteractiveConcept7 min20 XPOpen
3Random Is a TechnologyOrder the steps of a reproducible simple random sample.InteractiveConcept7 min20 XPOpen
4The Landon Landslide That Wasn'tExplain why a huge but poorly covered sample can lose to a smaller representative one.InteractiveConcept7 min20 XPOpen
5The Bias CatalogMatch common survey failures to coverage, voluntary-response, nonresponse, and response bias.InteractiveConcept7 min20 XPOpen
6Loaded QuestionsIdentify wording choices that push respondents toward an answer.InteractiveConcept7 min20 XPOpen
7Survivorship ArmorDetect survivorship bias when failed or missing cases disappear from view.InteractiveConcept7 min20 XPOpen
8Bias HuntDiagnose the mechanism behind common sampling and survey flaws.InteractivePractice9 min20 XPOpen
9Two Samples, Two AnswersRecognize ordinary sample-to-sample variation under a fixed population.InteractiveConcept7 min20 XPOpen
10The Estimate Has a DistributionInterpret a distribution made from many estimates rather than many individuals.InteractiveConcept7 min20 XPOpen
11Size Beats PercentageExplain why precision depends on sample count rather than population percentage.InteractiveConcept7 min20 XPOpen
12Bigger Calms the DanceCompare the variability of estimates from samples of 100 and 1,000.InteractiveConcept7 min20 XPOpen
13Stratify the SpoonfulUse stratified sampling to guarantee representation from important subgroups.InteractiveConcept7 min20 XPOpen
14The Census QuestionDecide when measuring an entire population is practical and worthwhile.InteractiveConcept7 min20 XPOpen
15Polling in PracticeSequence a defensible polling workflow from question to report.InteractiveConcept7 min20 XPOpen
16Nonresponse Eats PollsCompute response rate and explain why low response can threaten representativeness.InteractiveConcept8 min20 XPOpen
17Sampling WorkoutCombine sampling-design judgments with short variability calculations.InteractivePractice9 min20 XPOpen
18Design Your StudyAssemble a study design that aligns population, frame, sample, and measurement.InteractiveConcept7 min20 XPOpen
19Spot the Good PollEvaluate a poll from its design details rather than its headline sample size.InteractiveConcept7 min20 XPOpen
20Sampling Mastery CheckEvaluate design, bias, and variability in one polling scenario.InteractiveMastery check10 min40 XPOpen

The Bell Curve How Sure Are You