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Week 10 Summary......
Jeremy Jackson
|   May 2, 2016
NW 3431
|     New Westminster
Albert Einstein: "Great spirits have always encountered opposition from mediocre minds"

What To Do When Sigma Unknown


t-test for a single sample mean

Relationship between the t-distribution and the standard normal distribution


The Two Sample Case

The basic reserach study: One IV with 2 levels, 1 DV

Sampling from 2 populations

The null in a basic research study

The P-value in a basic reserach study


t-test for Independent Sample Means

t-test example

Example in MS Excel



Effect Size vs Statistical Significance

What is the effect size

Measures of sample effect size: Cohen's d.

Relationship between effect size and statistical significance

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