Khan Academy

Examples thinking about power in significance tests (K-A)

Introduction to power in significance tests (K-A)

Introduction to Type I and Type II errors (K-A)

Conditions for a z test about a proportion (K-A)

Constructing hypotheses for a significance test about a proportion (K-A)

Comparing P value to significance level for test involving difference of proportions (K-A)

Confidence interval for hypothesis test for difference in proportions (K-A)

Constructing hypotheses for two proportions (K-A)

Hypothesis test for difference in proportions example (K-A)

Hypothesis test for difference in proportions (K-A)

Comparing P-values to different significance levels (K-A)

Estimating a P-value from a simulation (K-A)

Examples of null and alternative hypotheses (K-A)

Idea behind hypothesis testing (K-A)

P-values and significance tests (K-A)

Comparing P-value from t statistic to significance level (K-A)

Example calculating t statistic for a test about a mean (K-A)

Free response example: Significance test for a mean (K-A)

Using a table to estimate P-value from t statistic (K-A)

Using TI calculator for P-value from t statistic (K-A)

When to use z or t statistics in significance tests (K-A)

Calculating confidence interval for difference of means (K-A)

Conditions for inference for difference of means (K-A)

Constructing t interval for difference of means (K-A)

Conditions for valid t intervals (K-A)