CK-12 Foundation
Ck 12: Testing a Hypothesis for Dependent and Independent Samples
[Free Registration/Login may be required to access all resource tools.] This Concept uses the t-distribution to test hypotheses for two samples.
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Fayetteville State University: Hypothesis Testing
A page from the university's statistics site which builds on the standard errors from the Central Limit Theorem previously explained. Here hypothesis testing is defined and validated.