Bartlett
Bartlett
Bartlett (pronunciation: /ˈbɑːrtlɪt/) is a term that has several meanings in the medical field. It is often associated with the Bartlett's test, a statistical method used in determining whether the variances of several groups are equal. It is also the name of a type of esophageal dilator, known as the Bartlett esophageal dilator.
Etymology
The term Bartlett is derived from the name of the British statistician Maurice Stevenson Bartlett who developed the Bartlett's test. The Bartlett esophageal dilator was named after the American physician who invented it.
Bartlett's Test
Bartlett's test is a statistical method used to test if k samples are from populations with equal variances. Equal variances across samples is called homogeneity of variances. Some statistical tests, such as the analysis of variance, assume that variances are equal across groups or samples. Bartlett's test is sensitive to departures from normality. That is, if your samples come from non-normal distributions, then Bartlett's test may simply be testing for non-normality.
Bartlett Esophageal Dilator
The Bartlett esophageal dilator is a medical instrument used to widen the esophagus in cases of esophageal stricture or other conditions that cause difficulty in swallowing. It is a long, flexible tube that is inserted into the esophagus to gradually stretch the esophagus and improve swallowing function.
Related Terms
- Esophageal stricture: A narrowing or tightening of the esophagus that causes swallowing difficulties.
- Esophageal dilation: A procedure that involves stretching or expanding the esophagus.
- Homogeneity of variances: The assumption that the variances are equal across groups or samples.
- Analysis of variance: A statistical method used to test differences between two or more means.
External links
- Medical encyclopedia article on Bartlett
- Wikipedia's article - Bartlett
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