Section 14.1Organizing and Visualizing Data

Objectives

1. Describe the population whose properties are to be analyzed.

2. Organize and present data.

Key Terms Statistics: an area in mathematics where we are interested in

gathering, analyzing, presenting, and making predictions from numerical information.

Data (Distribution): a collection of numerical information. Population: entire collection of items that is the focus of the

survey. Sample: a subset of the population. Biased: sample does not accurately reflect the population as a

whole with regard to data gathered. Selection Bias: how you chose the people to participate in the

survey. Leading Question Bias: the way a question is asked in a survey.

Key Terms Frequency Distribution: A set of data listed with their frequencies. Relative Frequency Distribution: contains the percent of time that

each item occurred. Frequency Table: a table that lists items and number of times it

occurs Bar Graph: a graph that compares different amounts using bars. Histogram: a special type of bar graph used to graph frequency

distribution. Stem-and-Leaf Display: a method of presenting data in a

graphical formal, similar to a histogram. It is used to assist in visualizing the shape of a distribution.

Example 1: Construct frequency table, relative frequency table, & bar graph

TB pg. 786/1 # of Hours Frequency

Relative Frequency

Example 2:Construct a bar graph for the data

TB pg. 786/3

Example 3:Draw a bar graph

TB pg. 786/5 # of Hours Frequency

Relative Frequency

Example 4:Group and draw histogram

TB pg. 786/9Height Frequency

Example 5: TB pg. 787/13

Example 6: TB pg. 788/15

Example 7:Comparing Wage Data

TB pg. 788/17

Example 8:Comparing Wage Data

TB pg. 788/19

Example 9:Stem-and-Leaf Plot

TB pg. 788/23

A B

Example 10:Comparing Training Programs

TB pg. 789/25

Section 14.1 Assignment Class work:

TB pg. 786/2 – 6 Even, and 26 Even Remember you must write problems and show

ALL work to receive credit for the assignment. Due Friday, Dec. 09, 2011.