- Check out these cool practice multiple choice tests by topic.
- Presentations - These are all PowerPoint presentations to go with Inference for Proportions (Chap 12 in the textbook).
- See the t-distribution - compare the t-distribution with the normal distribution for varying degrees of freedom
- How does the number of degrees of freedom affect the shape of the t-distribution?
- T-distribution Calculator - use this applet for t calculations, a little faster and more visual than your calculator
- Self-scoring quiz - Take a 10 question practice quiz on constructing confidence intervals using t.
- Confidence Interval Example
- T-Test Example - Take a look at this example to see the work that needs to be shown in conducting a complete t-test.
- Making Boxplots - Remember that the modified boxplot plots outliers as separate points (using the 1.5IQR rule). This plot will immediately identify if the sample has any outliers. You can also determine skewness from a boxplot. Skewness will be seen as one side of the box or one line (whisker) being elongated. This can be helpful in making sure a dataset meets the conditions for t distributions.
