1. DATA MANAGEMENT MBF3C Lesson #5: Measures of Spread

2. Learning Goals: To identify and describe properties associated with normal, bimodal & skewed distributions To calculate, using formulas, measures of central tendency (i.e., mean, median, mode). To calculate, using a graphing calculator, measures of central tendency (i.e., mean, median, mode). To explain the appropriate use of measures of central tendency (i.e., mean, median, mode)

3. INTRODUCTION Measures of central tendency are values around which a set of data tends to cluster. However, to analyse a set of data, it is useful to know how spread out the data are. Measures of spread describe how the values in a set of data are distributed.

7. Variance & Standard Deviation

8. MORE, USE TEXTBOOK Example 1: Determine Quartiles and the Interquartile Ranges (p. 141-142) Example 2: Calculate Range, Variance, and Standard Deviation (p. 143) Example 3: Compare Measures of Spread in Two Set of Data (p. 144)

9. Key Concepts