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 ...
Investopedia

T-Test: What It Is With Multiple Formulas and When to Use Them

This calculation can be used for hypothesis testing in statistics Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive ...
JSTOR Daily

A Group Sequential t-Test with Updating of Sample Size

This is a preview. Log in through your library . Abstract If the maximum sample size for a group sequential t-test is calculated on the basis of a prior estimate of the variance, power at a fixed ...
JSTOR Daily

The Determination of Sample Sizes for Use with the Exact Conditional Test in 2 x 2 Comparative Trials

Mainland and Sutcliffe [1953] and Bennett and Hsu [1960] have calculated the power of the exact conditional (Fisher-Irwin) test for differences between proportions. We have performed similar ...
Simon Fraser University

Two-Sample t-Test for Population Means

A t-test for population means compares the means between two populations. It is appropriate when the population standard deviations are unknown. This applet allows users to change the distributions of ...