Pooled-t and Non-pooled t Tests - Battaly

To compare ammonium concentrations, collected random samples. A normal probability plot of the Laguna Madre data was approximately a straight line. b Madre. b Independent b b Non­pooled­t 10.2 Two Population Means: = σ's Class Notes: Prof. G. Battaly, Westchester Community College, NY

  Tests, Samples, Independent, Pooled, 173 t, Pooled t, Pooled t tests

Chapter 410 Hotelling’s Two- Sample T2

t tests. Assumptions The following assumptions are made when using T2. 1. Each population follows the multivariate normal distribution. 2. The two samples are independent. 3. The two covariance matrices are equal. These are a set of restrictive assumptions that must be evaluated for each set of data. Box’s M test may be used to

  Tests, Samples, Independent

Experimental Psychology Practical Report

examined using an independent samples t-test. A t-value of 0.77 was calculated, where the critical t-value was 1.98. This means that there is not statistical evidence to reject H0 and to suggest that there is a significant difference between male and female’s Barratt Total Score even though the mean values differ (male: 66.36, female:65.51).

  Samples, Independent, Independent samples

The t-test

Paired Sample t Test Example • We want to know if there is a difference in the salary for the same job in Boise, ID, and LA, CA. The salary of 6 employees in …