77thth Grade Pre-Algebra Grade Pre-Algebra

Chapter 1-6Chapter 1-6

Collecting DataCollecting Data

Terms and Concepts (A)Terms and Concepts (A)

Sample: a small group used to Sample: a small group used to represent a much larger populationrepresent a much larger population

A good sample will:A good sample will:

Represent the larger populationRepresent the larger population

Be selected at randomBe selected at random

Be large enough to provide accurate Be large enough to provide accurate datadata

Terms and Concepts (B)Terms and Concepts (B)

Frequency table: a chart that employs Frequency table: a chart that employs tally marks to indicate the occurrence of tally marks to indicate the occurrence of specific events.specific events.

Cumulative frequency table: a Cumulative frequency table: a frequency table in which the previous frequency table in which the previous event occurrences are accumulated as event occurrences are accumulated as you move down the chart.you move down the chart.

Class assignmentClass assignment

Work examples 1-3 on pages 32-34.Work examples 1-3 on pages 32-34.

Do problems 3-16 on pages 34-35.Do problems 3-16 on pages 34-35.

Homework AssignmentHomework Assignment

Do problems 1-10 (all) on page 6 of the Do problems 1-10 (all) on page 6 of the workbook. workbook.