1. A researcher is interested in testing the common belief that most college students gain 15 pounds their freshman year of college. He collects the weight of a group of freshman in September and then again in April. Data is from p 800 in the text (You can save some time by getting the data from the CD that came with your book).
a. What is the mean median and mode of the weight obtained in September?
b. What is the standard deviation and variance for weight obtained in September and for weight obtained in April?
c. Compare these groups.
i. Did college students gain 15 pounds their freshman year of college?
ii. Explain the reasoning behind your answer.
d. Graph the distribution (Hint: using the DDXL add-in will make this very easy.)
e. Describe the distribution in terms of symmetry and skew