OUTLINE FOR CHAPTER 2

1. Picture Techniques for Summarizing Data
   1. Frequency distributions:
      1. Simple (ungrouped) frequency distribution
      2. Grouped frequency distribution
      3. Cumulative frequency distribution
   2. Stem-and-leaf displays
   3. Histograms and bar graphs: How they are alike and how they are different
   4. Frequency distributions in words
2. Distributional Shape
   1. The normal distribution
   2. The concept of "skewness" (Positively skewed; Negatively skewed)
   3. The concept of "modality" (Unimodal; Bimodal; Trimodal; etc.)
   4. Rectangular (i.e, uniform) distributions
   5. The concept of "kurtosis" (Leptokurtic; Mesokurtic; Platykurtic)
3. Measures of Central Tendency
   1. The concept of "average." (It's synonymous with "measure of central tendency")
   2. The three most popular measures of central tendency:  mode, median, mean
   3. The position of the mode, mean, and mean in skewed distributions
   4. Other measures of central tendency
4. Measures of Variability
   1. Synonyms for variability: dispersion, spread, or heterogeneity
   2. The range, the SIQR, and the box-and-whisker plot
   3. The standard deviation and the variance
   4. Other measures of variability
5. Standard Scores
   1. Focus and purpose
   2. Two popular types used in research: z-scores and T-scores
6. Cautions
   1. Two different means of the terms "skewed" and "quartile"
   2. The proper synonym for "average"
   3. Outliers
7. A Summary of the Abbreviations & Symbols Associated With This Chapter
    

   Cf	f	M	N	n	Q	Q1	Q2	Q3	R	s	s2
   SD	T		X	z	m	s	s2

Copyright © 2003 Schuyler W. Huck
All rights reserved.