1. Frequency Distributions Chapter 2

2. Distributions >Four different ways to visually describe just one variable Frequency table Grouped frequency table Frequency histograms Frequency polygon

6. Histogram for the Frequency Table of Graduate Advisors

7. Histogram for the Grouped Frequency Table of TV Pacing Index Data

8. Frequency Polygons as Another Graphing Option for the TV Pacing Index Data

9. >How old are the students in our class? Construct a frequency table; grouped frequency table; histogram; frequency polygon >What is the best method of presentation for our data? Check Your Learning

10. Shapes of Distributions >Normal distributions: Specific frequency distribution Bell shaped Symmetrical Unimodal

11. The Normal Distribution

12. >When our data are not symmetrical Positive: tail to the right >May represent floor effects Negative: tail to the left >May represent ceiling effects Memory hint: skew is where the tail is Skewed Distributions

13. Two Kinds of Skew

14. Everyone Improves

15. Helps the High Performers

16. Helps the Low Performers