Statistics
The numbers back it up: statistics doesn't have to be hard. Learn to explain data and calculate statistics with beginner to advanced tutorials, tools, worksheets, and formulas for students and teachers.

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Presenting Data in Graphic Form

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What Is the Moment Generating Function of a Random Variable?

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What Is Normal Distribution?

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Use of the Moment Generating Function for the Binomial Distribution

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"If and Only If" Usage

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What Is a Converse Error?

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Index of Qualitative Variation (IQV)

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The Number Pi: 3.141592654...

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When Is the Standard Deviation Equal to Zero?

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Maximum and Inflection Points of the Chi Square Distribution

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What Is the Cauchy Distribution?

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How to Find the Inflection Points of a Normal Distribution

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What Is the Skewness of an Exponential Distribution?

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Understanding Levels and Scales of Measurement in Sociology

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What Are De Morgan's Laws?

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How to Prove De Morgan's Laws

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Linear Regression Analysis

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The Difference Between the Mean, Median, and Mode

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Analysis of Variance (ANOVA)

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Introduction to Sociology Statistics

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Lambda and Gamma as Defined in Sociology

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The LIPET Strategy for Integration by Parts

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What Are the Converse, Contrapositive, and Inverse?

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Variance and Standard Deviation

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What Is the Power Set?

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Unbiased and Biased Estimators

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How to Calculate the Mean, Median, and Mode

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What Is Quantitative Data?

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What Is the Plural of Data?

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How to Use the BINOM.DIST Function in Excel

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7 Graphs Commonly Used in Statistics

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Learn the Difference Between a Parameter and a Statistic

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The Differences Between Explanatory and Response Variables

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Calculations With Standard and Normal Distributions in Excel

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What Is the Negative Binomial Distribution?

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How to Do Hypothesis Tests With the Z.TEST Function in Excel

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What Is a Scatterplot?

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KURT Function for Kurtosis in Excel

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Paired Data in Statistics

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How to Use the STDEV.S Function in Excel

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What Is a Population in Statistics?

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How to Use the NORM.INV Function in Excel

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The Difference Between Extrapolation and Interpolation

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Functions with the TDistribution in Excel

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What Is a Real Number?

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How to Use the RAND and RANDBETWEEN Functions in Excel

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The Associative and Commutative Properties

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What Is Ecological Correlation?

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Definition of Bimodal in Statistics

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What Is Robustness in Statistics?

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ChiSquare Functions in Excel

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Qualitative Data Definition and Examples

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The Difference Between Simple and Systematic Random Sampling

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Convenience Sample Definition and Examples in Statistics

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What Is a Systematic Sample?

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An Introduction to Hypothesis Testing

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The Number e: 2.7182818284590452...

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The Levels of Measurement in Statistics

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Correlation and Causation in Statistics

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Types of Samples in Statistics

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Creating an Access 2013 Database From Scratch

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Hypothesis Test Example

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Simple Random Samples From a Table of Random Digits

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Creating Forms in Microsoft Access 2010

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Hypothesis Test for the Difference of Two Population Proportions

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Microsoft Access UserLevel Security Tutorial

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How to Calculate a Sample Standard Deviation

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Differences Between Population and Sample Standard Deviations

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Examples of Zscore Calculations

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What Is Statistical Sampling?

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What Is a Histogram?

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Histogram Classes

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What Is Correlation in Statistics?

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Converting an Access Database to SQL Server

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How to Back up a Microsoft Access Database

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Relative Frequency Histograms

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How to Make a Boxplot

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What Are Pie Charts?

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How to Create a Database from Scratch in Access 2007

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How To Add a Date or Time Stamp to an Access 2010 Database Table

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An Introduction to the Bell Curve

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Overview of Simpson's Paradox in Statistics

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How to Calculate Probabilities with A Standard Normal Distribution Table

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Example of Two Sample T Test and Confidence Interval

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How to Make a Stem and Leaf Plot

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What Is the Standard Normal Distribution?

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Splitting an Access 2010 Database into FrontEnd and BackEnd Components

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How Bar Graphs Are Used to Display Data

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How To Install Microsoft Access 2013

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How to Install Microsoft Access 2010

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Understanding Statistics

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How to Conduct a Hypothesis Test

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Example of a ChiSquare Goodness of Fit Test

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What Are Inner and Outer Fences?

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Microsoft Access 2003 Tutorial for Creating Forms

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What Is a PValue?

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What Is the Median?

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The Difference Between Probability and Statistics

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ChiSquare Goodness of Fit Test

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Tallies and Counts in Statistics

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The Formula for Expected Value

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Probability of the Union of Three or More Sets

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Binomial Table for n = 2, 3, 4, 5 and 6

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Binomial Table for n=7, n=8 and n=9

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Formula for the Normal Distribution or Bell Curve

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Binomial Table for n= 10 and n=11

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Addition Rules in Probability

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ZScore Formula

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How to Calculate the Variance of a Poisson Distribution

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Margin of Error Formula for Population Mean

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Sum of Squares Formula Shortcut

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The Standard Normal Distribution Table

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The Formula for ChiSquare Statistic

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Student t Distribution Table

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Calculations With the Gamma Function

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Exponential Distribution Medians

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Student's t Distribution Formula

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What Is a Table of Random Digits in Statistics?

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How to Derive the Formula for Combinations

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What Courses Do You Need to Take for a Statistics Degree?

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Examples of Uncountable Infinite Sets

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How Many Elements Are in the Power Set?

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Probabilities for Rolling Two Dice

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When Do You Use a Binomial Distribution?

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The Features of a Standard Deck of Cards

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How to Calculate the Expected Value

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What Is the Multiplication Rule for Independent Events?

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Probabilities for Rolling Three Dice

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Expected Value of a Binomial Distribution

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The Probability of Rolling a Yahtzee

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Probabilities and Liar's Dice

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Expected Value in Roulette

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What Is the Intersection of Two Sets?

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How to Use the Normal Approximation to a Binomial Distribution

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How Are Odds Related to Probability?

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Probabilities in the Game Monopoly

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How to Calculate Powerball Probabilities

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Probability of Going to Jail in Monopoly

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What Is Set Theory?

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Sampling With or Without Replacement

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The Meaning of Mutually Exclusive in Statistics

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Probabilities for Dihybrid Crosses in Genetics

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Probability and Punnett Squares in Genetics

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What Is the Probability You Just Inhaled a Part of Lincoln's Last Breath?

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What Is a Sample Space?

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What Is the Probability of a Flush

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What Is the Probability of Randomly Choosing a Prime Number?

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What Is the FDistribution?

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How to Use a Tree Diagram for Probability

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The Difference Between Combinations and Permutations

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What Is Symmetric Difference?

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What Is a Probability Distribution?

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What Is Markov's Inequality?

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What Is Chebyshev's Inequality?

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What Is a Uniform Distribution?

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How to Prove the Complement Rule in Probability

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ChiSquare Activity With Candy

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The Complement Rule

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Uniform in Probability

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What Are Probability Axioms?

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Understanding the Importance of the Central Limit Theorem

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Using Conditional Probability to Compute Probability of Intersection

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Why Does Zero Factorial Equal One?

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Understanding the Factorial (!) in Mathematics and Statistics

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What Is the Empty Set in Set Theory?

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What Is the Difference of Two Sets in Set Theory?

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What Is the Gamma Function?

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The Normal Approximation to the Binomial Distribution

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Expected Value for ChuckaLuck

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How to Calculate Backgammon Probabilities

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How to Succeed in Statistics and Math Classes

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The Probability of a Large Straight in Yahtzee in a Single Roll

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Probability of a Small Straight in Yahtzee in a Single Roll

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What Is Conditional Probability?

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The Probability of a Full House in Yahtzee in a Single Roll

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What Is the Union?

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What Is a SigmaField?

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Levels of Measurement Worksheet With Solutions

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ZScores Worksheet

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Worksheet for Chebyshev's Inequality

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Worksheet on Combinations and Permutations

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Standard Normal Distribution Problems

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Calculating ZScores in Statistics

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Challenging Counting Problems and Solutions

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How to Classify the Kurtosis of Distributions

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How to Make a Histogram in 7 Simple Steps

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Slope of Regression Line and Correlation Coefficient

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What Is Skewness in Statistics?

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What Are the Maximum and Minimum?

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Overview of Percentiles in Statistics

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What Are the First and Third Quartiles?

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What Are Moments in Statistics?

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What Is a TwoWay Table of Categorical Variables?

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Calculating the Mean Absolute Deviation

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How to Calculate the Correlation Coefficient

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What Are Residuals?

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Empirical Relationship Between the Mean, Median, and Mode

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What Is a Range in Statistics?

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Descriptive vs. Inferential Statistics

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What Are Time Series Graphs?

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Understanding the Interquartile Range in Statistics

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What Is the 5 Number Summary?

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How Are Outliers Determined in Statistics?

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Range Rule for Standard Deviation

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What Is the Interquartile Range Rule?

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What Is the Midhinge?

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Frequencies and Relative Frequencies

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What Is a Least Squares Line?

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Understanding Quantiles: Definitions and Uses

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Variance and Standard Deviation

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What Level of Alpha Determines Statistical Significance?

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Null Hypothesis and Alternative Hypothesis

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How to Construct a Confidence Interval for a Population Proportion

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Why Say "Fail to Reject" in a Hypothesis Test?

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Statistics: Degrees of Freedom

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Parametric and Nonparametric Methods in Statistics

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Type I and Type II Errors in Statistics

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What Is the Difference Between Alpha and PValues?

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Examples of Confidence Intervals for Means

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Maximum Likelihood Estimation Examples

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Degrees of Freedom for Independence of Variables in TwoWay Table

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Example of an ANOVA Calculation

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How Large of a Sample Size Do Is Needed for a Certain Margin of Error?

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An Example of a Hypothesis Test

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Calculate a Confidence Interval for a Mean When You Know Sigma

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How to Find Critical Values with a ChiSquare Table

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An Example of ChiSquare Test for a Multinomial Experiment

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Example of Confidence Interval for a Population Variance

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How to Find Degrees of Freedom in Statistics

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The Difference Between Type I and Type II Errors in Hypothesis Testing

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Confidence Interval for the Difference of Two Population Proportions

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What Is the Runs Test?

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What Is ANOVA?

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How to Calculate the Margin of Error

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Example of a Permutation Test

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The Use of Confidence Intervals in Inferential Statistics

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Four Confidence Interval Mistakes

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Calculating a Confidence Interval for a Mean

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Plus Four Confidence Intervals

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What Is a Sampling Distribution

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An Introduction to Queuing Theory

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The Probability of Being Dealt a Royal Flush in Poker

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Millions, Billions, and Trillions

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What Are the Odds of Winning the Lottery?

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Groundhog Day Statistics

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Leap Day Statistics

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Example of Bootstrapping

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Statistics Related to Father's Day

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What Is Bootstrapping in Statistics?

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Sten Scores and Their Use in Rescaling Test Scores

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March Madness Statistics

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Statistics and Political Polls

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What Is the St. Petersburg Paradox?

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Stanine Score Example

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What Is a Placebo?

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What Is a Double Blind Experiment?