Welch–Satterthwaite equation

Welch–Satterthwaite Equation

Welch–Satterthwaite equation

to get instant updates about 'Welch–Satterthwaite Equation' on your MyPage. Meet other similar minded people. Its Free!


All Updates

In statistics and uncertainty analysis, the Welch–Satterthwaite equation is used to calculate an approximation to the effective degrees of freedom of a linear combination of independent sample variances.

For sample variances , each respectively having degrees of freedom, often one computes the linear combination

 chi' = sum_^ k_ s_^.

In general, the distribution of cannot be expressed analytically. However, its distribution can be approximated by another chi-squared distribution, whose effective degrees of freedom are given by the Welch–Satterthwaite equation

nu_ approx frac

There is no assumption that the underlying population variances are equal.

The result can be used to perform approximate statistical inference tests. The simplest application of this equation is in performing Welch's t test.


  • ...

Read More

No feeds found

Posting your question. Please wait!...

No updates available.
No messages found
Suggested Pages
Tell your friends >
about this page
 Create a new Page
for companies, colleges, celebrities or anything you like.Get updates on MyPage.
Create a new Page
 Find your friends
  Find friends on MyPage from