Khan Academy

Confidence interval for a mean with paired data (K-A)

Example constructing a t interval for a mean (K-A)

Example finding critical t value (K-A)

Introduction to t statistics (K-A)

Simulation showing value of t statistic (K-A)

Conditions for a t test about a mean (K-A)

Writing hypotheses for a significance test about a mean (K-A)

Conclusion for a two-sample t test using a confidence interval (K-A)

Conclusion for a two-sample t test using a P-value (K-A)

Example of hypotheses for paired and two-sample t tests (K-A)

Hypotheses for a two-sample t test (K-A)

Two-sample t test for difference of means (K-A)

Chi-square test for association (independence) (K-A)

Introduction to the chi-square test for homogeneity (K-A)

Chi-square goodness-of-fit example (K-A)

Chi-square statistic for hypothesis testing (K-A)

Conditions for inference on slope (K-A)

Confidence interval for the slope of a regression line (K-A)

Introduction to inference about slope in linear regression (K-A)

Calculating t statistic for slope of regression line (K-A)

Using a confidence interval to test slope (K-A)

Using a P-value to make conclusions in a test about slope (K-A)

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

Significance test for a proportion free response (part 2 with correction) (K-A)

Significance test for a proportion free response example (K-A)