Math203 Ch2 notes

Math203 Ch2 notes - Chapter 2 Organizing Qualitative Data...

This preview shows pages 1–7. Sign up to view the full content.

Chapter 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Organizing Qualitative Data Frequency Distributions A two-column chart listing the categories and frequencies Total frequency = total number of observations Relative Frequency Distribution Reports relative frequencies instead of frequencies Relative frequency = frequency/total Total relative frequency=1 (because of rounding, sometimes it is only close to 1) Relative frequency may be reported as a percentage Grade Frequency A 12 B 5 C 7 Grade Relative frequency A 0.5 B 0.21 C 0.29
Organizing Qualitative Data Bar chart Lists categories with bars that are the frequency in length Often vertical but may be horizontal 0 20 40 60 80 100 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 2003 Quarters Total Book Sales 0 50 100 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 2003 Quarters Total Book Sales 0 50 100 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr East East West North

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Organizing Qualitative Data Pareto Chart A bar chart with the bars organized from most to least 0 20 40 60 80 100 3rd Qtr 2nd Qtr 1st Qtr 4th Qtr
Organizing Qualitative Data Pie Chart A circle segmented based on relative frequencies as percentages. Each segment represents a different category 1st Qtr 13% 2nd Qtr 17% 3rd Qtr 57% 4th Qtr 13%

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Organizing Quantitative Data Frequency Distribution Class : The set of numbers we are determining the frequency Class limits : smallest & largest numbers that can be included in a class Lower limit : the smallest Upper limit : the largest Class width : the range of numbers that can be in a class Class Boundaries : are used to make sure we do not overlap the class limits Lower boundary & Upper boundary Class Midpoint : the middle of the class Ages Class limit Class Boundary Frequency 32-39 31.5-39.5 12 40-47 39.5-47.5 5 48-55 47.5-55.5 7 56-63 55.5-63.3 6
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 02/23/2010.

Page1 / 19

Math203 Ch2 notes - Chapter 2 Organizing Qualitative Data...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online