test
7.10 Pooled-Variance t Procedures: Investigating the Normality Assumption
7.5 Welch (Unpooled Variance) t Tests and Confidence Intervals: Introduction
7.6 Welch (Unpooled Variance) t Tests and Confidence Intervals: An Example
7.9 An Example of a Paired-Difference t Test and Confidence Interval
7.4 Pooled-Variance t Tests and Confidence Intervals: An Example
I discuss the assumptions of both the pooled-variance and Welch (unpooled variance) t tests and confidence intervals, and their advantages and disadvantages. I illustrate some of pros and cons using the results of two simulations.
7.10 Pooled-Variance t Procedures: Investigating the Normality Assumption7.5 Welch (Unpooled Variance) t Tests and Confidence Intervals: Introduction7.6 Welch (Unpooled Variance) t Tests and Confidence Intervals: An Example7.9 An Example of a Paired-Difference t Test and Confidence Interval7.4 Pooled-Variance t Tests and Confidence Intervals: An Example7.10 Pooled-Variance t Procedures: Investigating the Normality Assumption7.5 Welch (Unpooled Variance) t Tests and Confidence Intervals: Introduction7.6 Welch (Unpooled Variance) t Tests and Confidence Intervals: An Example7.9 An Example of a Paired-Difference t Test and Confidence Interval7.4 Pooled-Variance t Tests and Confidence Intervals: An Example