Sample Size Explorers

Sample Size and Power Calculators

When planning experiments or studies, use the Sample Size Explorers to answer questions like these:

• How many units should I test?

• Will I be able to detect a difference in my treatment means?

• How many samples are needed to construct an interval with a specified width?

• How many units must I test to estimate failure time?

The Sample Size Explorers are a collection of interactive utilities that enable you to adjust study parameters and assumptions to explore different study designs. The tools are grouped by use:

• Power for hypothesis testing.

• Confidence intervals for interval estimation.

• Reliability demonstrations.

Figure 28.1 Sample Size Explorer for One Sample Mean 

Contents

Overview of the Sample Size Explorers Platform

Example of Sample Size Explorers

Launch Sample Size Explorers

Power Explorers for Hypothesis Tests

Power for One Sample Mean

Power for One Sample Proportion

Power for One Sample Variance

Power for One Sample Equivalence

Power for Two Independent Sample Means

Power for Two Independent Sample Proportions

Power for Two Independent Sample Variances

Power for Two Independent Sample Equivalence

Power for ANOVA

Confidence Interval Calculators

Margin of Error for One Sample Mean

Margin of Error for One Sample Proportion

Margin of Error for One Sample Variance

Margin of Error for Two Independent Sample Means

Margin of Error for Two Independent Sample Proportions

Margin of Error for Two Independent Sample Variances

Reliability Demonstration Calculators

Parametric Reliability Demonstration

Nonparametric Reliability Demonstration

Saved Settings in the Sample Size Explorers

Want more information? Have questions? Get answers in the JMP User Community (community.jmp.com).