Significance tests (hypothesis testing) videos

Simple hypothesis testing

Idea behind hypothesis testing

Comparing P-values to different significance levels

P-values and significance tests

Estimating a P-value from a simulation

Examples of null and alternative hypotheses

Type 1 errors

Introduction to Type I and Type II errors

Introduction to power in significance tests

Examples identifying Type I and Type II errors

Examples thinking about power in significance tests

Constructing hypotheses for a significance test about a proportion

Calculating a z statistic in a test about a proportion

Calculating a P-value given a z statistic

Conditions for a z test about a proportion

Making conclusions in a test about a proportion

Writing hypotheses for a significance test about a mean

Conditions for a t test about a mean

When to use z or t statistics in significance tests

Example calculating t statistic for a test about a mean

Using TI calculator for P-value from t statistic

Using a table to estimate P-value from t statistic

Comparing P-value from t statistic to significance level

Free response example: Significance test for a mean

Hypothesis testing and p-values

One-tailed and two-tailed tests

Small sample hypothesis test

Z-statistics vs. T-statistics

Large sample proportion hypothesis testing