PSY 555 Homework 2

 Chapter 2: #2, *4*, 7, 14, 15

*2.4*: a) as is

b) plot a grouped frequency distribution instead of an ungrouped frequency distribution, following other book instruction

c) as is

1)  Find the mean, median, and mode for the data sets of 2.4, 2.14, and 2.15.

2)  Describe each of the distributions (normal, skewed, etc.) of 2.4, 2.14, and 2.15.

3)   Under what circumstances will the mean, median, and mode all have the same value?  Under what circumstances is the median the preferred measure of central tendency?

4)  Why do we often use histograms instead of frequency distributions?