# Question

The history of statistical hypothesis testing really began with a tea-tasting experiment (Fisher, 1935), so it seems fitting for this chapter to end with one. The owner of a small tearoom doesn’t think people really can tell the difference between the first cup made with a given tea bag and the second and third cups made with the same bag (which is why it is still a small tearoom). He chooses eight different brands of tea bags, makes three cups of tea with each, and then has a group of customers rate each cup on a 20-point scale (without knowing which cup is which). The data are shown here, with higher ratings indicating better tea:

Using Friedman’s test, draw the appropriate conclusions.

Engage. Prepare. Educate.

Using Friedman’s test, draw the appropriate conclusions.

Engage. Prepare. Educate.

## Answer to relevant Questions

In testing the effects of context in the example you developed in Exercise 1.1, to what would the words “population” and “sample” refer? Repeat the analysis in Exercise 20.2 using the normal approximation. In Exercise 20.2 Rerun the analysis in Exercise 20.7 using the normal approximation. In Exercise 20.7 Compute confidence limits on the mean risk ratio and draw the appropriate conclusions. Three of the studies referred to in the previous exercises also looked at ratings of ADHD severity. These results follow: (a) Compute the mean effect size from these studies. (b) Compute confidence limits on the mean effect ...Post your question

0