A study in Psychonomic Bulletin and Review (Lea, Thomas, Lamkin, and Bell, 2007) presented evidence that, "people use facial prototypes when they encounter different names." Participants were given two faces and asked to identify which one was Tim and which one was Bob. The researchers conjectured that students would choose Tim for the person on the leftmore than would be expected by random chance. Of the 70 students sampled, 56 students selected Tim for the left.

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.
4. State the statistic for this study. Assign a symbol.
5. State the null and alternative hypotheses. 5-1.In Words. 5-2. In Symbols
6. Based on the dot-plot below, is it likely to have observed 2 out of 28 people selecting tap water? Explain

Mean = 0.250 SD = 0.081 2 0 0.07 0.14 0.21 0.29 0.36 0.43 0.50 Proportion of successes