Imagine being lost at sea, bobbing around in an orange life jacket. The coast guard sends out two kinds of observers to find youfellow humans and trained pigeons. Each observer is successful; the researcher wants to know which observer is faster: humans or pigeons. The search time in minutes for each observer is given in the table below. Answer the questions, analyze the results, and write a conclusion. a) What are the null and alternative hypotheses? Ho: H1: b) Should the researcher use a one-tailed or two-tailed test? Why? c) Conduct a t-test on the following data. What are the results? Fellow Humans Pigeons 55 30 65 25 40 26

d) Write a conclusion in plain English. e) Use Cohen's d to determine the effect size. Is the difference meaningful (i.e., is the effect small, moderate, or largeuse your book to determine these standards)?