HypothesisTesting`
HypothesisTesting`

# KnownVariance

KnownVariance

is an option to statistical confidence interval and hypothesis test functions that specifies the value of the population variance.

# Details and Options

• To use KnownVariance, you first need to load the Hypothesis Testing Package using Needs["HypothesisTesting`"].
• The value of KnownVariance can be a positive number or None.
• For KnownVariance->None, the population variance is estimated from the input data.
• For confidence intervals and tests based on two samples, variances var1 and var2 for the two populations can be given as KnownVariance->{var1,var2}.

# Examples

## Basic Examples(1)

A test assuming the population variance is 5:

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

#### Text

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

#### CMS

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

#### APA

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

#### BibTeX

@misc{reference.wolfram_2024_knownvariance, author="Wolfram Research", title="{KnownVariance}", year="2007", howpublished="\url{https://reference.wolfram.com/language/HypothesisTesting/ref/KnownVariance.html}", note=[Accessed: 15-June-2024 ]}

#### BibLaTeX

@online{reference.wolfram_2024_knownvariance, organization={Wolfram Research}, title={KnownVariance}, year={2007}, url={https://reference.wolfram.com/language/HypothesisTesting/ref/KnownVariance.html}, note=[Accessed: 15-June-2024 ]}