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Making Sense of the Two-Sample T-Test: Supercharge Your Hypotheses Tests

The two-sample t-test is one of the most commonly used hypothesis tests in Six Sigma work. It is applied to compare the average difference between two groups. You use it to determine if the difference ...
Investopedia

Two-Tailed Test: Definition, Examples, and Importance in Statistics

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
JSTOR Daily

Hypothesis Testing When the Sample Size is Treated as a Random Variable

In the Neyman-Pearson theory of hypothesis testing it is customary to calculate significance levels and power functions on the assumption that the sample size is fixed. The main purpose of this paper ...
Investopedia

Key Assumptions of T-Tests Explained for Accurate Statistical Analysis

J.B. Maverick is an active trader, commodity futures broker, and stock market analyst 17+ years of experience, in addition to 10+ years of experience as a finance writer and book editor. T-tests are ...