Probability & Statistics – Day 8  Frequency Distributions  Assignment  Return Chapter 1 Test 1

Chapter 2 FREQUENCY DISTRIBUTIONS AND GRAPHS 2

Key Terms  Raw Data: data collected in original form.  Ex: What town/city do you live in? 3

Types of Frequency Distributions  Categorical: used for data that can be placed in specific categories (nominal and ordinal).  Ex: political affiliation, religious affiliation, or major field of study.  Uses 3 columns: CLASS, FREQUENCY, PERCENT (nearest tenth). 4

Categorical Frequency Distributions CATEGORYFREQUENCYPERCENT 5

Types of Frequency Distributions  Grouped: used when the range of data is large; data is grouped into classes that are more than one unit.  Ex: minutes traveling, miles traveled  Uses 4 columns: CLASS LIMITS, CLASS BOUNDARIES, FREQUENCY, CUMULATIVE FREQUENCY. 6

Grouped Frequency Distributions  Determining classes: 1) Approximately 5-20 classes. 2) Class width should be an odd number. 3) Classes must be mutually exclusive. 4) Classes must be continuous. 5) Classes must be exhaustive. 6) Classes must be equal in width. 7

Grouped Frequency Distributions 8

CLASS LIMITBOUNDARIESFREQUENCYCUMULATIVE FREQ 9

Assignment  Review procedures for creating frequency distributions.  Page 40:

Probability & Statistics – Day 9  Homework Solutions – Page 40: 3-5  Review Categorical and Grouped Frequency Distributions  Ungrouped Frequency Distributions  Assignment 11

Types of Frequency Distributions  Ungrouped: used when the range of data is relatively small; a single data value is used for each class.  Ex: age of students in high school  Uses 4 columns: CLASS LIMITS, CLASS BOUNDARIES, FREQUENCY, CUMULATIVE FREQUENCY. 12

Ungrouped Frequency Distribution CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ 13

In-Class Assignment  Pages 41-42: 7-11, 16 14

Probability & Statistics – Bell Ringer  If a frequency distribution has a class with the class limits of 12-18: 1. What is the width? 2. What are the class boundaries? 3. What would be the next four classes? 15

Probability & Statistics – Day 10  Homework Solutions – Page 41: 7-11, 16  Comparisons and Conclusions  Review Frequency Distributions/More Practice  Frequency Distribution Worksheet 16

Page 41: 7 ZIP CODEFREQUENCYPERCENT % % % % % 17

Page 41: 8 CLASS RANKFREQUENCYPERCENT FR1845% SO1230% JR615% SR410% 18

Page 41: 9 CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ – – – – – –

Page 41: 10 CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ – – – – – –

Page 41: 11 CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ

Page 41: 16 CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ

Additional Group Practice  Pages 41-42: 12, (must have to observations for each)  Frequency Distribution Quiz Tomorrow 23

Page 41: 12 CLASSBOUNDARIESFREQUENCYCUMULATIVE FREQ

Probability & Statistics – Day 11  Frequency Distribution Quiz  Chapter One Review Activity (due tomorrow)  Read pp