People spend a lot of money on bottled water. But do they really prefer bottled water to ordinary tap water? Researchers at Longwood University (Lunsford and Dowling Fink, 2010) investigated this question by presenting people who came to a booth at a local festival with four cups of water. Three cups contained different brands of bottled water, and one cup was filled with tap water. Each subject (person) was asked which of the four cups of water they most preferred. Researchers kept track of how many people chose tap water in order to see whether tap water was chosen significantly less often than would be expected by random chance. 2 out of 28 individuals selected the tap water.

1. State the research question.

2. What is the variable of interest? Identify this as categorical or quantitative.

3. What is the parameter of interest? Assign a symbol to it.

4. State the statistic for this study. Assign a symbol to it.

5. State the null and alternative hypotheses:

5-1. In Words

5-2. In Symbols