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Statistics

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What's the Difference Between Type I and Type II Errors?

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What Is the Birthday Problem?

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Stop Making These Four Mistakes with Your Confidence Intervals

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The Latest in Statistics
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Learn More About the Negative Binomial Distribution
The negative binomial distribution occurs when we ask about the number of trials that must occur before we have a predetermined number of successes.
Test statistic for comparing two population proportions - C.K.Taylor
Compare Two Population Proportions with This Hypothesis Test
See how to conduct a hypothesis test for the difference of two population proportions.
Formula for confidence interval for difference of two proportions - C.K. Taylor
Confidence Interval Example for Difference of Population Proportions
See a worked out example of how to calculate a confidence interval for the difference of two population proportions.
Formula for confidence interval for difference of two proportions - C.K. Taylor
Confidence Intervals for the Difference of Two Population Proportions
See how to construct a confidence interval for the difference of two population proportions and learn some of the theory behind this topic in statistics.
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Probabilities for Dihybrid Crosses in Genetics
See how to calculate probabilities in genetics for a dihybrid cross.
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Learn How to Calculate Probabilities in Genetics with Punnett Squares
See how to use a table called a Punnett square to help calculate probabilities in genetics.
Formula for test statistic for hypothesis test for population proportion - C.K.Taylor
Hypothesis Test for a Population Proportion
Follow these detailed instructions to conduct a hypothesis test for a single population proportioen.
Formula for confidence interval for population proportion. - C.K.Taylor
How to Construct a Confidence Interval for a Population Proportion
See how to construct a confidence interval for a population proportion.
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Probabilities for Liar's Dice
Liar's dice is a game that involves bidding on dice that are unseen by others. See how to calculate probabilities related to this game.
Formula for Students' t distribution - C.K.Taylor
Example of Two Sample T Test and Confidence Interval
See this worked out example of the two sample t test and two sample confidence interval.
The CONFIDENCE.T function in Excel - C.K.Taylor
Functions with the T-Distribution in Excel
Excel has a variety of programmed functions that involve the t-distribution.
Example of a Permutation Test
See a worked out example of a permutation test concerning the difference of two means.
Scatterplot with least squares regression line - C.K.Taylor
What to Look for in a Scatterplot
A scatterplot is a type of statistical graph that looks like a jumble of points. Learn what questions you should ask about a scatterplot.
What Are De Morgan's Laws?
The complement of a union and the complement of an intersection can be rewritten using De Morgan's Laws.
How to Prove De Morgan's Laws
See how to prove a result known from set theory that is called De Morgan's law.
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