Tests about a population mean

These significance tests tell us if a sample offers convincing evidence that a population mean is different from some hypothesized value.

Writing hypotheses for a significance test about a mean

Writing hypotheses for a test about a mean

Conditions for a t 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

Calculating the test statistic in a t test for a mean

Using TI calculator for P-value from t statistic

Using a table to estimate P-value from t statistic

Calculating the P-value in a t test for a mean

Comparing P-value from t statistic to significance level

Making conclusions in a t test for a mean

Free response example: Significance test for a mean