HypothesisTesting`
HypothesisTesting`

# EqualVariances

EqualVariances

is an option to statistical confidence interval and hypothesis test functions of two samples that specifies that unknown population variances are equal.

# Details and Options

• To use EqualVariances, you first need to load the Hypothesis Testing Package using Needs["HypothesisTesting`"].
• EqualVariances is an option for confidence interval and hypothesis test functions of two lists.
• With the default setting EqualVariances->False, variances are estimated from the two samples independently if the variances are not specified as known.
• With EqualVariances->True, a common pooled estimate of the variance is used for both populations if the variances are not specified as known.

# Examples

## Basic Examples(1)

A test assuming equal variances:

Wolfram Research (2007), EqualVariances, Wolfram Language function, https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html.

#### Text

Wolfram Research (2007), EqualVariances, Wolfram Language function, https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html.

#### CMS

Wolfram Language. 2007. "EqualVariances." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html.

#### APA

Wolfram Language. (2007). EqualVariances. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html

#### BibTeX

@misc{reference.wolfram_2024_equalvariances, author="Wolfram Research", title="{EqualVariances}", year="2007", howpublished="\url{https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html}", note=[Accessed: 15-June-2024 ]}

#### BibLaTeX

@online{reference.wolfram_2024_equalvariances, organization={Wolfram Research}, title={EqualVariances}, year={2007}, url={https://reference.wolfram.com/language/HypothesisTesting/ref/EqualVariances.html}, note=[Accessed: 15-June-2024 ]}