Exploratory Data Analysis

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Coding
Theory
Quiz

    Dataset Profiling Structure Summary

    • Column Profile Summary DataFrame

      Junior

    • Detect Constant Columns

      Junior

    • Classify DataFrame Column Types

      Junior

    • Dtype Census Summary

      Junior

    • Transposed Numeric Describe Report

      Junior

    • Categorical Column Profiling Helper

      Mid

    • Memory Profile by Dtype

      Mid

    • Numeric Column Profile Summary

      Mid

    • Detect ID-Like Columns by Cardinality

      Mid

    • Column Alerts Profiler Panel

      Mid

    • Detect Numbers Stored As Text

      Mid

    • Category Memory Savings Report

      Senior

    • Dataset Overview Panel Series

      Senior

    • Detect Table Grain via Candidate Keys

      Senior

    • Schema Drift Diff Between Extracts

      Senior

    Univariate Numeric Distributions

    • Skewness Flag Report

      Junior

    • Mean-Median Gap Skew Report

      Junior

    • Histogram Bin Counts In Bin Order

      Junior

    • Coefficient of Variation Ranking

      Junior

    • Tukey Five-Number Summary

      Junior

    • Skewness and Kurtosis Convention Audit

      Mid

    • Kurtosis Tail Shape Report

      Mid

    • Analyst-Chosen Percentile Table

      Mid

    • Robust vs Classical Spread Report

      Mid

    • Descriptive Normality Shape Screen

      Mid

    • Mode Report for Sentinel Detection

      Mid

    • Distribution Shape Scorecard

      Senior

    • Robust vs Moment Skewness Report

      Senior

    • Compare Histogram Bin-Width Rules

      Senior

    • Detect Modality From Bin Counts

      Senior

    Univariate Categorical Frequency Analysis

    • Detect Rare Categorical Levels

      Junior

    • Categorical Frequency Table

      Junior

    • Class Imbalance Ratio

      Junior

    • Object-Column Cardinality Report

      Junior

    • Top-N With Other Report

      Junior

    • Pareto 80/20 Analysis Table

      Mid

    • Class Imbalance Report

      Mid

    • Missingness-Aware Frequency Table

      Mid

    • Pareto 80/20 Verdict for a Categorical Series

      Mid

    • Entropy-Based Class Imbalance Score

      Mid

    • Detect Unused Categorical Levels

      Mid

    • Market Concentration Report (HHI)

      Senior

    • Category Share Shift Across Samples

      Senior

    • Long-Tail Coverage Report

      Senior

    Missingness Data Quality Profiling

    • Ranked Missingness Report

      Junior

    • Per-Row Completeness Score

      Junior

    • Duplicate Row Profile Series

      Junior

    • Missing Rate By Segment

      Junior

    • Hidden Missing Value Report

      Junior

    • Co-Missingness Pair Correlation

      Mid

    • MCAR Screen by Nullity Split

      Mid

    • Missing Rate Matrix by Segment

      Mid

    • Dataset Completeness Overview Series

      Mid

    • Duplicate Key Profile

      Mid

    • Detect Mixed-Type Object Columns

      Mid

    • Missingness Pattern Report

      Senior

    • Directional Conditional Missingness Lift

      Senior

    • Duplicate Group Conflict Report

      Senior

    • Nullity vs Target Gap Report

      Senior

    Bivariate Numeric Relationships Correlation

    • Rank Numeric Features by Target Correlation

      Junior

    • Strongest Correlated Column Pair

      Junior

    • Covariance vs Correlation Scale Invariance

      Junior

    • Find Zero-Variance Correlation Columns

      Junior

    • Top N Correlated Column Pairs

      Mid

    • Pearson vs Spearman Gap

      Mid

    • High-Correlation Column Report

      Mid

    • Spearman From Ranks

      Mid

    • Correlation Sample Sizes

      Mid

    • Correlation Matrix With Exclusion Report

      Mid

    • Pairwise vs Listwise Correlation Gap

      Senior

    • Pearson vs Spearman Sign Disagreement

      Senior

    • Covariance vs Correlation Ranking

      Senior

    • Leave-One-Out Correlation Influence

      Senior

    • Rank Correlation Under Ties

      Senior

    Segment Comparison Group Insight

    • Flag Unreliable Segments By Sample Size

      Junior

    • Top and Bottom Segments by Mean

      Junior

    • Segment Lift vs Overall Mean

      Junior

    • Segment Share of Total

      Junior

    • Two-Dimensional Segment Lift Report

      Mid

    • Impact-Weighted Segment Ranking

      Mid

    • Segment Distribution Comparison Report

      Mid

    • Weighted vs Unweighted Segment Average

      Mid

    • Mean vs Median Divergence by Segment

      Mid

    • Confounder Reversal Scan

      Senior

    • Simpson's Paradox Reveal

      Senior

    • Mix vs Rate Decomposition

      Senior

    • Direct Standardization Segment Comparison

      Senior

    • Shrinkage-Adjusted Segment Lift Ranking

      Senior

    Outlier Anomaly Exploration

    • Dataset-Wide Outlier Triage Report

      Junior

    • Extreme-Value Context Table

      Junior

    • Tukey Outlier Severity Census

      Junior

    • Box Plot Statistics Without Drawing

      Junior

    • Outlier Rule Disagreement Check

      Mid

    • Quantify Outlier Impact on Headline Stats

      Mid

    • Contextual Outlier Screening by Group

      Mid

    • Z-Score vs IQR Outlier Gap

      Mid

    • Outlier Evidence Table With Reasons

      Mid

    • Per-Segment Local vs Global Outlier Report

      Mid

    • Masking Diagnostic for Z-Score Rule

      Senior

    • Outlier Impact Ranking Sweep

      Senior

    • Tukey Fence Sensitivity Curve

      Senior

    • Multi-Column Outlier Row Screen

      Senior

    Time Series Trend Exploration

    • Month-Over-Month Revenue Growth Report

      Junior

    • Detect Missing Daily Dates

      Junior

    • Best and Worst Monthly Periods

      Junior

    • Split-Half Trend Direction Screen

      Junior

    • Year-over-Year Growth Report

      Mid

    • Day-of-Week Seasonality Index

      Mid

    • Trailing Rolling Level-Shift Flags

      Mid

    • Autocorrelation Lag Scan for Seasonality

      Mid

    • Daily Feed Coverage Report

      Mid

    • Longest Growth Streak Report

      Mid

    • MoM vs YoY Growth Divergence Report

      Senior

    • Deseasonalized Trend Report

      Senior

    • Trend Slope Screening Across Metrics

      Senior

    • Rank Level-Shift Changepoint Candidates

      Senior

    Target Relationship Feature Screening

    • Categorical Target Rate and Lift Table

      Junior

    • Class Balance Summary

      Junior

    • Feature Means by Binary Target

      Junior

    • Binned Target Rate Table

      Mid

    • Leakage Suspect Screen

      Mid

    • Standardized Gap Report With Cohen's d

      Mid

    • Near-Zero-Variance Feature Screen

      Mid

    • Multi-Class Category Lift Matrix

      Mid

    • Cross-Column Level Lift Screening

      Mid

    • Monotonic Feature Screen for Scorecards

      Senior

    • WoE and Information Value Table

      Senior

    • Feature-Target Association Ranking

      Senior

    • Categorical Perfect Separation Screening

      Senior

    • Cramér's V Feature Ranking

      Senior