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128 lessons · 48 hr 44 min

Ratio Metrics and the Delta MethodExperimentation & A/B Testing · Advanced Designs & Decisions—22 mintodayDrawing the GraphCausal Inference · DAGs7524 mintodaySilent FailuresSQL for Analytics · Foundations—22 minyesterdaySelf-Joins and Row-to-Row ComparisonSQL for Analytics · Comparison—22 minyesterdayWhen Sorting PaysAlgorithmic Thinking · Sorting and Searching—20 minyesterdayComprehensions and GeneratorsPython for Data Analysis · Data Structures That Matter—18 min2 days agoWhy This TeamBehavioral Round · Fit9816 min2 days agoNon-Parametric TestsProbability & Statistical Inference · When Assumptions Break7722 min2 days agoWhat One Row MeansSQL for Analytics · Foundations—36 min3 days agoSituation, Not SettingBehavioral Round · The Story Shape—18 min3 days agoCutting the PreambleCommunication & Presence · Concision—18 min3 days agoBackdoor Paths and What to Adjust ForCausal Inference · DAGs7428 min3 days agoWorking with DatesSQL for Analytics · Foundations—20 min4 days agoCollapse — GROUP BYSQL for Analytics · The Computation5620 min4 days agoLanding the ResultBehavioral Round · The Story Shape—18 min4 days agoConfounding, Selection, Reverse CausalityCausal Inference · What Goes Wrong—26 min4 days agoOne Idea Per SentenceCommunication & Presence · Concision—18 min5 days agoWhen the Data LiesExperimentation & A/B Testing · Validity & Pitfalls—28 min5 days agoAlternatives, and When Not to ExperimentExperimentation & A/B Testing · Advanced Designs & Decisions7526 min5 days agoPreserve — Window FunctionsSQL for Analytics · The Computation—30 min6 days agoNumbers Without InflationBehavioral Round · Your Own Work—18 min6 days agoColliders and MediatorsCausal Inference · What Goes Wrong—22 min6 days agoActivation and the Growth LoopProduct Sense & Metric Design · Growth and Economics8025 min7 days agoSessionization, Gaps and IslandsSQL for Analytics · Sequence Patterns—26 min7 days agoThe Decision Is the StoryBehavioral Round · The Story Shape—22 min7 days agoInterference and Network EffectsExperimentation & A/B Testing · Advanced Designs & Decisions—26 min7 days agoGrowth Accounting and ViralityProduct Sense & Metric Design · Growth and Economics—24 min8 days agoOutput, Grain, Conditions, ComputationSQL for Analytics · Reading the Question—24 min8 days agoMemory and ChunkingPython for Data Analysis · Reading Data—16 min8 days agoNarrating a PlanCommunication & Presence · Thinking Out Loud—20 min8 days agoBehavioral and Structural ThreatsExperimentation & A/B Testing · Validity & Pitfalls—26 min8 days agoThe Randomization BoundaryCausal Inference · When Randomization Is and Isn't Available—20 min8 days agoLists, Dicts and SetsPython for Data Analysis · Data Structures That Matter—22 min9 days agoChoosing Your MetricsExperimentation & A/B Testing · Designing the Test—26 min9 days agoPeeking and Multiple ComparisonsExperimentation & A/B Testing · Validity & Pitfalls—26 min9 days agoPropensity ScoresCausal Inference · The Methods—28 min9 days agoInstrumental VariablesCausal Inference · The Methods—30 min9 days agoTypes on ImportPython for Data Analysis · Reading Data8318 min10 days agoUnit Economics: LTV, CAC, PaybackProduct Sense & Metric Design · Growth and Economics5930 min11 days agoResampling and Rolling WindowsPython for Data Analysis · Time Series—24 min11 days agoMatchingCausal Inference · The Methods—26 min11 days agoPace as PunctuationCommunication & Presence · Voice and Pace—20 min12 days agoChoosing the Right TestProbability & Statistical Inference · Hypothesis Testing—30 min12 days agoInstrumentation & Data QualityExperimentation & A/B Testing · Designing the Test—18 min12 days agoCorrelation, Causation, CounterfactualsCausal Inference · The Causal Question—22 min12 days agoCohort RetentionSQL for Analytics · Shape Patterns6430 min13 days agoTraversal OrdersAlgorithmic Thinking · Trees and Graphs—24 min13 days agoOwning the Part You DidBehavioral Round · Your Own Work—20 min13 days agoThe Testing FrameworkProbability & Statistical Inference · Hypothesis Testing—22 min13 days agoHypothesis Testing in A/BExperimentation & A/B Testing · The Statistical Engine8524 min13 days agoRunning Metrics and Interval LogicSQL for Analytics · Sequence Patterns—24 min12 OctTime Zones and GapsPython for Data Analysis · Time Series—18 min12 OctPrefix SumsAlgorithmic Thinking · Arrays and Strings6418 min12 OctRecovering From a BlankCommunication & Presence · Thinking Out Loud—18 min12 OctSignpostingCommunication & Presence · Structure Under Pressure—18 min12 OctDifference-in-DifferencesCausal Inference · The Methods—30 min12 OctRegression DiscontinuityCausal Inference · The Methods—26 min12 OctVectorisation over LoopsPython for Data Analysis · Correctness—20 min11 OctShortest Paths, PracticallyAlgorithmic Thinking · Trees and Graphs—22 min11 OctErrors, P-values & PowerProbability & Statistical Inference · Hypothesis Testing—30 min11 OctInterpreting ResultsExperimentation & A/B Testing · The Statistical Engine8420 min11 OctCountingProbability & Statistical Inference · Probability Foundations—16 min11 OctMetric Quality: Sensitivity and RobustnessProduct Sense & Metric Design · What Makes a Good Metric8726 min9 OctPivot, Melt and StackPython for Data Analysis · Reshaping—22 min9 OctAssertions and Sanity ChecksPython for Data Analysis · Correctness—16 min9 OctFunnels and Wide TablesSQL for Analytics · Shape Patterns8526 min8 OctSliding WindowsAlgorithmic Thinking · Arrays and Strings6522 min8 OctAnswer First, Then WhyCommunication & Presence · Structure Under Pressure8522 min8 OctThe Useful PauseCommunication & Presence · Voice and Pace6416 min8 OctThe Law of Large Numbers & the CLTProbability & Statistical Inference · From Sample to Population8828 min8 OctChoosing the Right MethodCausal Inference · Choosing and Defending—24 min8 OctThe Metric LandscapeProduct Sense & Metric Design · What Makes a Good Metric—22 min7 OctGroup By and AggregatePython for Data Analysis · Reshaping—24 min7 OctCounting OperationsAlgorithmic Thinking · Cost Before Code—20 min7 OctRandom Variables, PMF, PDF, CDFProbability & Statistical Inference · Random Variables & Distributions—20 min7 OctPopulation, Sample, Parameter, StatisticProbability & Statistical Inference · From Sample to Population—18 min7 OctSample Size and DurationExperimentation & A/B Testing · Power, Sample Size & Duration6826 min7 OctPotential Outcomes and Treatment EffectsCausal Inference · The Causal Question6428 min7 OctConditional Probability & BayesProbability & Statistical Inference · Probability Foundations8626 min7 OctRetention CurvesProduct Sense & Metric Design · Behavior Over Time—30 min6 OctDeduplication and Top-NSQL for Analytics · Shape Patterns—20 min6 OctSelection and FilteringPython for Data Analysis · pandas Foundations9020 min6 OctBig-O in WordsAlgorithmic Thinking · Cost Before Code—18 min6 OctTwo PointersAlgorithmic Thinking · Arrays and Strings8722 min6 OctQuestions That Buy You TimeCommunication & Presence · The Room7016 min6 OctWhat an Experiment Buys YouExperimentation & A/B Testing · Foundations8922 min6 OctSensitivity Analysis and What Breaks ItCausal Inference · Choosing and Defending—24 min6 OctThe Rules of ProbabilityProbability & Statistical Inference · Probability Foundations8818 min6 OctMerges and Fan-outPython for Data Analysis · Reshaping—20 min5 OctThe Discrete DistributionsProbability & Statistical Inference · Random Variables & Distributions6926 min5 OctPower and Minimum Detectable EffectExperimentation & A/B Testing · Power, Sample Size & Duration8826 min5 OctThe DataFrame GrainPython for Data Analysis · pandas Foundations—26 min4 OctMembership and DedupAlgorithmic Thinking · Hashing—16 min4 OctSampling Distributions & Standard ErrorProbability & Statistical Inference · From Sample to Population—26 min3 OctDisagreement Without BlameBehavioral Round · Conflict and Failure—22 min2 OctUnits of Randomization and AnalysisExperimentation & A/B Testing · Foundations—22 min2 OctGuardrails, Counter-metrics and Trade-offsProduct Sense & Metric Design · Designing the Metric Set—24 min1 OctMissing DataPython for Data Analysis · pandas Foundations—18 min1 OctMaps as CountersAlgorithmic Thinking · Hashing—18 min1 OctReading the InterviewerCommunication & Presence · The Room—20 min1 OctCohort AnalysisProduct Sense & Metric Design · Behavior Over Time9026 min30 SeptA Failure You Can NameBehavioral Round · Conflict and Failure9120 min30 SeptThe Normal FamilyProbability & Statistical Inference · Random Variables & Distributions—28 min30 SeptExpectation, Variance, CovarianceProbability & Statistical Inference · Random Variables & Distributions—24 min30 SeptWhat Makes a Good EstimatorProbability & Statistical Inference · Estimation—24 min30 SeptFunnels and Drop-offProduct Sense & Metric Design · Behavior Over Time7125 min29 SeptChurn and ResurrectionProduct Sense & Metric Design · Engagement, Churn and Segments—22 min29 SeptTesting Before You SubmitAlgorithmic Thinking · Under Pressure—16 min29 SeptBuilding IntervalsProbability & Statistical Inference · Confidence Intervals—28 min29 SeptNorth Star and Metric DecompositionProduct Sense & Metric Design · Designing the Metric Set—26 min27 SeptEngagement and StickinessProduct Sense & Metric Design · Engagement, Churn and Segments—25 min27 SeptSegmentationProduct Sense & Metric Design · Engagement, Churn and Segments7625 min27 SeptDistributions and DefinitionsSQL for Analytics · Judgment—26 min27 SeptSelection, Censoring and TimeSQL for Analytics · Judgment—26 min27 SeptBinary Search on AnswersAlgorithmic Thinking · Sorting and Searching7624 min27 SeptTalking Through a SolutionAlgorithmic Thinking · Under Pressure7218 min27 SeptSaying No to a StakeholderBehavioral Round · Influence—18 min27 SeptWhat a Confidence Interval Actually SaysProbability & Statistical Inference · Confidence Intervals9322 min27 SeptRoot Cause AnalysisProduct Sense & Metric Design · Diagnosing Movements—30 min26 SeptMaximum LikelihoodProbability & Statistical Inference · Estimation7426 min26 SeptBootstrap & PermutationProbability & Statistical Inference · When Assumptions Break—26 min26 SeptCUPEDExperimentation & A/B Testing · Variance Reduction7628 min26 SeptPersuading Without AuthorityBehavioral Round · Influence—22 min25 SeptData Quality, Instrumentation and MonitoringProduct Sense & Metric Design · Diagnosing Movements7522 min24 SeptQuestions Worth Asking BackBehavioral Round · Fit5316 min23 SeptThe Multiple Comparisons ProblemProbability & Statistical Inference · When Assumptions Break7620 min23 SeptWhy Variance Reduction Is Free PowerExperimentation & A/B Testing · Variance Reduction—24 min23 SeptComparison and ConfoundingSQL for Analytics · Judgment—26 min22 Sept