HypothesisTesting`
HypothesisTesting`

# ChiSquareCI

ChiSquareCI[var,df]

gives a confidence interval based on a distribution with df degrees of freedom.

# Details and Options

• To use ChiSquareCI, you first need to load the Hypothesis Testing Package using Needs["HypothesisTesting`"].
• ChiSquareCI[var,df] gives a confidence interval {min,max} for a population variance estimated by var.
• For confidence level , and where is the quantile of a distribution with degrees of freedom.
• ChiSquareCI is the confidence interval for a population variance based on a sample variance var estimated from a sample of size df+1.
• The following option can be given:
•  ConfidenceLevel 0.95 probability associated with a confidence interval

# Examples

open allclose all

## Basic Examples(1)

A 95% confidence interval based on a distribution:

## Options(1)

### ConfidenceLevel(1)

A 99% confidence interval:

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

#### Text

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

#### CMS

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

#### APA

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

#### BibTeX

@misc{reference.wolfram_2022_chisquareci, author="Wolfram Research", title="{ChiSquareCI}", year="2007", howpublished="\url{https://reference.wolfram.com/language/HypothesisTesting/ref/ChiSquareCI.html}", note=[Accessed: 08-June-2023 ]}

#### BibLaTeX

@online{reference.wolfram_2022_chisquareci, organization={Wolfram Research}, title={ChiSquareCI}, year={2007}, url={https://reference.wolfram.com/language/HypothesisTesting/ref/ChiSquareCI.html}, note=[Accessed: 08-June-2023 ]}