1. Standard DA-2, DA-3
Objectives: 1. Introduce the basic terminology in chapter 3
2. Do problems to find measures of central tendency

2. Key terms
Center Shape Spread Mean Median Mode Midrange Average Grouped mean Weighted mean

3. Measures of Center It is a value at the center or middle of a data set
The measures are mean, median, mode, and midrange

4. Mean is not a resistant measure
Median is a resistant measure
Mode: No, Bi, Multi
Midrange is easy to compute

5. Average
Note that average is not a statistical term. Never use the term average in statistics

6. Mean, only interval level and ratio level
Median, all four levels except nominal
Mode, all four levels

7. Measures of center
Ungrouped data
Grouped data

8. Textbook Short Answer questions: Do the problems: 1 thru 28 yourself
Long Answer Questions:
Do the problems: Page 97: 29 thru 34 (Guided)