Three unipolar limb leads (Augmented limb leads):

VR (right arm), VL (left arm) and VF (left foot).

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#Id: 4917

#Unit 13. Methods in Biology

Variance and Standard Deviation Formula.

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#Id: 4918

#Unit 13. Methods in Biology

Variance Formula

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#Id: 4920

#Unit 13. Methods in Biology

The sample variance formula is given as

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#Id: 4923

#Unit 13. Methods in Biology

A chi-squared test (symbolically represented as χ2) is basically a data analysis on the basis of observations of a random set of variables. Usually, it is a comparison of two statistical data sets.

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#Unit 13. Methods in Biology

The chi-square test is used to estimate how likely the observations that are made would be, by considering the assumption of the null hypothesis as true.

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#Id: 4941

#Unit 13. Methods in Biology

When we consider, the null speculation is true, the sampling distribution of the test statistic is called as chi-squared distribution.