Alexandra Carides's Videos Home Faculty Alexandra Carides Refine Videos Commonly Used Confidence Intervals Comparing Two Population Means PT1 Comparing Two Population Means PT2 Comparing Two Population Proportions PT1 Comparing Two Population Proportions PT2 Confidence Intervals for the Mean (t-Statistic) Confidence Intervals for the Mean (z-Statistic) PT1 Confidence Intervals for the Mean (z-Statistic) PT2 Confidence Intervals for the Population Proportion Sample Size Determination Test of Significance Introduction Tests of Significance for the Population Mean (t-Statistic) Tests of Significance for the Population Mean (z-Statistic) PT1 Tests of Significance for the Population Mean (z-Statistic) PT2 Tests of Significance for the Population Proportion (z-Statistic) PT1