https://www.khanacademy.org/math/10th-grade-math-revised-k-to-10-3-terms/x06a77af3c81397cf:third-term/x06a77af3c81397cf:statistical-reports/a/v2-sat-lesson-evaluating-statistical-claims 2022-10-18T02:23:40.2192308Z Evaluating statistical claims | Lesson A guide to evaluating statistical claims on the digital SAT article https://www.khanacademy.org/math/10th-grade-math-revised-k-to-10-3-terms/x06a77af3c81397cf:third-term/x06a77af3c81397cf:statistical-reports/v/sat-math-q10-easier 2021-02-10T21:38:00Z Data collection and conclusions — Basic example Watch Sal work through a basic Data collections and conclusions problem. video https://cdn.kastatic.org/googleusercontent/jQUv7a-MvjQC_3TILDdfUrPbiIKDyPS2uNe4tsYtBhfpBvJvxBGkcfl-LRde-XXIJPV7C3ap9Z8FV1JbxQ4ckGFDWpL5E3uMwawqbA Data collection and conclusions — Basic example Watch Sal work through a basic Data collections and conclusions problem. https://cdn.kastatic.org/ka-youtube-converted/hers3k7x5JA.mp4/hers3k7x5JA.mp4 142 Statistical reports https://www.khanacademy.org/math/10th-grade-math-revised-k-to-10-3-terms/x06a77af3c81397cf:third-term/x06a77af3c81397cf:statistical-reports/v/sat-math-q8-harder 2021-02-09T20:41:42Z Data inferences — Harder example Watch Sal work through a harder Data inferences problem.  We make a confidence interval by starting with a sample result and adding and subtracting the margin of error. Consequently, the sample result is the exact middle of the interval. If we were to build a new interval based on the same data but with a reduced confidence level, the new interval would have the same center but a smaller margin of error. Here's a diagram illustrating this problem another way. video https://cdn.kastatic.org/googleusercontent/O-0oMQllk3fB6amNEnvyHUzmtEZYp9NZna8brOi0Am2LmF_SRNUCSWrNgLFPba5DKFSheKVbXGfu8i3eSHrHIFM Data inferences — Harder example Watch Sal work through a harder Data inferences problem.  We make a confidence interval by starting with a sample result and adding and subtracting the margin of error. Consequently, the sample result is the exact middle of the interval. If we were to build a new interval based on the same data but with a reduced confidence level, the new interval would have the same center but a smaller margin of error. Here's a diagram illustrating this problem another way. https://cdn.kastatic.org/ka-youtube-converted/8ZVW3aVtE80.mp4/8ZVW3aVtE80.mp4 268 Statistical reports https://www.khanacademy.org/math/10th-grade-math-revised-k-to-10-3-terms/x06a77af3c81397cf:third-term/x06a77af3c81397cf:statistical-reports/e/v2-evaluating-statistical-claims-1 2023-12-04T17:55:05.230178085Z Evaluating statistical claims: foundations Evaluating statistical claims: foundations Duo Yang exercise https://www.khanacademy.org/humanities/us-government-and-civics/us-gov-political-participation/x231f0f4241b58f49:how-does-public-opinion-shape-policy/v/why-polls-can-be-wrong 2023-05-19T19:50:23.318023542Z Why polls can be wrong Polls and surveys are valuable tools for estimating public opinion, but they're not foolproof. The 2016 presidential election serves as a prime example of their limitations. Factors like sampling techniques, voter likelihood, and the electoral college system can impact poll accuracy, so it's crucial to approach them with a critical eye. video https://cdn.kastatic.org/googleusercontent/AQNYg-O0yFk9S-OyAE5HKilHkjtIAmFml0fL4oV5Tb2CTcU2f8h46lgK8-HaoIcDX3xC39YFE6v3Y6Tjq_0IKE0w Why polls can be wrong Polls and surveys are valuable tools for estimating public opinion, but they're not foolproof. The 2016 presidential election serves as a prime example of their limitations. Factors like sampling techniques, voter likelihood, and the electoral college system can impact poll accuracy, so it's crucial to approach them with a critical eye. https://cdn.kastatic.org/ka-youtube-converted/DVKY9alKYtc.mp4/DVKY9alKYtc.mp4 157 Statistical reports https://www.khanacademy.org/humanities/us-government-and-civics/us-gov-political-participation/x231f0f4241b58f49:how-does-public-opinion-shape-policy/v/why-policy-decisions-may-not-reflect-perceived-public-opinion 2023-05-19T19:50:23.318023542Z Why policy decisions may not reflect perceived public opinion Public opinion on stricter gun laws has spiked, but policy decisions may not always align with these perceptions. Factors like mistrust in poll data, temporary trends, regional differences, political calculus, and nuanced understanding of the issue can influence lawmakers' decisions, making it an uphill battle for stricter gun laws. video https://cdn.kastatic.org/googleusercontent/K63G9psFltUtjIfadp8jJpW1kvv9eZg4kqJp1qYTLsTGoaL-68wzCBGq54mJRIHoxJSgnaxQxTkHAZzewtDUzdFl Why policy decisions may not reflect perceived public opinion Public opinion on stricter gun laws has spiked, but policy decisions may not always align with these perceptions. Factors like mistrust in poll data, temporary trends, regional differences, political calculus, and nuanced understanding of the issue can influence lawmakers' decisions, making it an uphill battle for stricter gun laws. https://cdn.kastatic.org/ka-youtube-converted/2Etffnqb1qE.mp4/2Etffnqb1qE.mp4 185 Statistical reports https://www.khanacademy.org/humanities/us-government-and-civics/us-gov-political-participation/x231f0f4241b58f49:how-does-public-opinion-shape-policy/e/evaluating-public-opinion-data 2026-04-07T23:55:07.30621384Z Evaluating public opinion data Test your skills on evaluating conclusions in public opinion data. Leah Marquez exercise https://www.khanacademy.org/math/ap-statistics/gathering-data-ap/xfb5d8e68:inference-experiments/v/statistical-significance-experiment 2021-07-01T17:39:46Z Statistical significance of experiment Sal determines if the results of an experiment about advertising are statistically significant. Sal Khan video https://cdn.kastatic.org/googleusercontent/QvC1Y41tr90sl2OllpaQKcbePLIUoeCP9pqwyOGwy85WbamOtrO7XJ-2J0_24p6qaDHfMgEuWesj8T94_pusYjRvhw Statistical significance of experiment Sal determines if the results of an experiment about advertising are statistically significant. https://cdn.kastatic.org/ka-youtube-converted/jLFeqQxGtOc.mp4/jLFeqQxGtOc.mp4 484 Statistical reports https://www.khanacademy.org/math/ap-statistics/gathering-data-ap/xfb5d8e68:inference-experiments/a/scope-of-inference-random-sampling-assignment 2021-07-01T17:39:50Z Random sampling vs. random assignment (scope of inference) article https://www.khanacademy.org/math/ap-statistics/gathering-data-ap/xfb5d8e68:inference-experiments/e/obs-studies-vs-experiments 2026-02-20T21:40:45.189715981Z Conclusions in observational studies versus experiments Practice determining what conclusions we can draw from a study based on it being an observational study or an experiment. Jeff Dodds exercise https://www.khanacademy.org/math/ap-statistics/gathering-data-ap/xfb5d8e68:inference-experiments/e/issues-experiments 2021-07-01T17:39:47Z Finding errors in study conclusions Practice identifying which principals of good experiment design have or haven't been met in a study. Jeff Dodds exercise