Suppose we wanted to know if people get more nervous before flying in an airplane or taking a ship to their destinations. In other words, are people more afraid of falling from the sky or sinking in the ocean? Because stress levels vary a great deal across different people, perhaps it would be best to ask the same people to rate their nervousness before flying and before sailing. Nervousness will be measured by number of breaths per minute.
Breathing rate immediately prior to flying and sailing might look like the following:
Before Flying Before Sailing
14 12
20 15
22 23
12 16
14 9
25 21
21 17
8 9
a. What statistic would we use to analyze this data set? Be specific
b. Write the null and alternative hypothesis for this example.
c. Analyze these data, showing all work
d. Write the result: reject or fail to reject H0, and write a statement of significance.
e. If appropriate, calculate the effect size and confidence interval
f. Write the outcome of this study in plain English. Whad did we learn about the types of travel and nervousness (by breathing rate) in this study?