# 31 Statistical Concepts Explained in Simple English – Part 9

31 Statistical Concepts Explained in Simple English – Part 9 Source – datasciencecentral.com

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**31 Statistical Concepts Explained in Simple English**

- Hotelling’s T-Squared: Simple Definition
- Normal Distribution Probability in Excel: All Versions up to 2016
- Hypergeometric Distribution: Examples and Formula
- Hypothesis Test in Excel for the Population Mean (Large Sample)
- Idempotent Matrix: Definition, Examples
- IID Statistics: Independent and Identically Distributed Definition and Examples
- Independent Random Variables: Definition, Examples
- Independent Samples T Test (Unpaired Samples): Definition, Running
- Independent Variable (Treatment Variable) Definition and Uses
- Index Number: Simple Definition
- Inferential Statistics: Definition, Uses
- Information Bias (Observation Bias): Definition, Examples
- Instrumental Variable: Definition & Overview
- Interaction Effect, Statistical Interactions & Interacting Variable
- Internal Consistency Reliability: Definition, Examples
- Internal Validity: Definition and Examples
- Inter-rater Reliability IRR: Definition, Calculation
- Interval Estimate: Definition, Examples
- Interval Scale & Interval Variable: Simple Definition & Examples
- Intervening variable: Simple Definition & Examples
- Intraclass Correlation
- Inverse Gamma Distribution: Definition, Mean, Variance, PDF
- Inverse Normal Distribution
- Jaccard Index / Similarity Coefficient
- Jarque-Bera Test
- Joint Probability and Joint Distributions: Definition, Examples
- Kaiser-Meyer-Olkin (KMO) Test for Sampling Adequacy
- Kendall’s Tau (Kendall Rank Correlation Coefficient)
- Kolmogorov-Smirnov Goodness of Fit Test
- KPSS Test: Definition and Interpretation
- Krippendorff’s Alpha Reliability Estimate: Simple Definition

Previous editions can be accessed here: Part 1 | Part 2 | Part 3 | Part 4 | Part 5 | Part 6* |* Part 7* |* Part 8.

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