Math

Binomial Distribution Animation

Introduction

This animation demonstrates the binomial distribution for a test consisting of multiple-choice questions, with the person being tested having absolutely no information about which answer is correct when trying to answer each question. Some examples of this situation are:

Am I Psychic?

Introduction

Have you ever wondered if you have psychic ability - the ability to perceive information hidden from the normal senses?. Here is your chance to find out.

Which Survey Calculator Should I Use?

The following calculators may be useful when conducting a survey. Each calculator computes one value, such as the confidence interval or survey size, given several other values.

Simple Sample Size Calculator

The calculator found below will compute the sample size given the population size, margin of error and confidence level.

Animated Confidence Interval Calculator

The calculator found below will compute the margin of error and confidence interval given the population size, sample size, sample percentage, and confidence level.

If you want to print your calculations, you must use the Simple Confidence Interval Calculator. This calculator cannot be printed using your browser's print command.

Simple Confidence Interval Calculator

The calculator found below will compute the margin of error and confidence interval given the population size, sample size, sample percentage, and confidence level.

If you want to see an animation of the confidence interval, you must use the Animated Confidence Interval Calculator. This calculator does not show an animation.

Advanced Sample Size Calculator

The calculator found below will compute the sample size given the population size, estimated population percentage, margin of error and confidence level.

If the population percentage cannot be estimated, then the Simple Sample Size Calculator should be used instead.