Grade 12 Data management 2 1 lesson 4 handout Essay

Submitted By ZoeyBai
Words: 678
Pages: 3
Open Document
MDM 4U1
LESSON NOTES

DATE: ____________________

2.1

DATA ANALYSIS WITH GRAPHS

STATISTICS is a branch of mathematics that deals with the collection, analysis, interpretation, and presentation of data. The unprocessed information collected for a study is called raw data. The quantity being measured is the variable. A continuous variable can have any value within a given range, such as the height of students in a class. A discrete variable can have only certain separate values, often integers, such as the number of students in a class.
This section introduces a variety of techniques for displaying data in graphs to help us visualize the characteristics of the data.
EXAMPLE 1 – FREQUENCY TABLES AND DIAGRAMS
The following table shows the age distribution of students at a certain secondary school. Complete the column for the cumulative frequency.
Age

Frequency

12

15

13

25

14

112

15

126

16

102

17

86

18

74

19

12

Cumulative
Frequency

We can show the frequency of the ages using a bar graph or a frequency polygon.
A frequency polygon joins the midpoints of the bars in a bar graph.
120

Where is the greatest proportion of students grouped?

Frequency
Frequency

100

80
60

40
20

12 13 14 15

16 17 18 19 20

Age

We can also graph the cumulative frequency using a polygon.

Cumulative Frequency

500
400

300

200

100

12 13 14 15 16

17 18 19 20

Age

EXAMPLE 2 – RELATIVE FREQUENCY DISTRIBUTION
The following table represents the heights of 50 players on the junior basketball team.
Heights of the Players (cm)
174
161
170
190
152

163
174
182
153
161

175
165
163
172
191

170
159
166
179
170

180
177
187
184
173

167
183
179
182
168

182
185
171
157
181

168
188
191
173
181

153
193
166
178
184

171
177
160
177
182

Complete the following table. Adjust the endpoints for your intervals for a continuous range of values.
Height
Interval
150 – 159
160 – 169
170 – 179
180 – 189
190 – 199

Midpoint

Tallies

Frequency

Relative
Frequency

Relative
Cumulative
Cumulative
Frequency
Frequency

We can show the frequency of the heights using a histogram or a frequency polygon. A histogram is a special form of bar graph in which the bars are connected and represent a continuous range of values.
The frequency polygon joins the midpoints of the histogram.
Are any trends or patterns apparent from the table?

20

Frequency

16

12

What proportion of the players was between 170 and 179 cm?

8

4

150

160

170

180

190

200

Height (cm)
Similarly, the relative and cumulative frequencies can be illustrated.
EXAMPLE 3
Below are a class’ scores on a
Show More

Related Documents: Grade 12 Data management 2 1 lesson 4 handout Essay

Psychology: Statistics and Post hoc Analyses Essay

Psychology / Sociology 205L Data Analysis in the Behavioral Sciences Term: Fall 2006 Instructor: Marilyn Johnson-Kozlow, PhD Day/time: MW, 12:30-1:50PM Email: mfjohnson@palomar.edu Location: Lower Library-104 Units: 1 unit Lab Hours per Week: 3 hours Grading Basis: Grade/Credit/No Credit Co-requisite: Current enrollment in Psych/Soc 205 Scope of Course: Use the Statistical Package for the Social Sciences (SPSS) to analyze research data. Data analysis will include descriptive…

Words 709 - Pages 3

Essay on project management

fcontent 51240 Project Management Learning guide Quarter 2, 2014 51240 PROJECT MANAGEMENT (PG) QUARTER 2, 2014 | CONTENTS Contents SECTION ONE SECTION THREE ABOUT PROJECT MANAGEMENT (PG) 3 Contacts 3 Unit overview 3 Student feedback 3 TEACHING ACTIVITIES Schedule of activities Classes and learning 14 15 SECTION FOUR LEARNING RESOURCES SECTION TWO 14 17 Overview of learning resources and assessment 17 ASSESSMENT INFORMATION…

Words 6308 - Pages 26

Assignment 4D Mentoring Presentation Paper pdf

Dr. Grays 1 " " " " " " " " " " " " " " " " Understanding Disadvantaged Youth in CTE" " Dr. Eddie Lee Grays, Jr." " Assignment 4D: Mentoring Presentation Paper" " CTTE 4/56018: Disadvantaged Youth in CTTE" " April 23, 2015" " " " " " " " " " " " " " " " " " " " " " Dr. Grays 2 Introduction! ! Define the concept of mentoring. In my opinion, mentoring is the association of a more experienced person with that of a less experienced one. The goal in this association is to help the less experienced…

Words 4322 - Pages 18

Essay on Syllabus: Management and Outline Form Response

6380.501 FALL 2005 Class Meeting Monday 1900-2145, SOM 2.801 Office Hours: Mon/Wed 3:00 – 4:30 PM Or by appointment Dr. Joseph C. Picken SOM 4.212 Email: jpicken@utdallas.edu Phone (UTD office): (972) 883-4986 Phone (McKinney office): (972) 562-5401 COURSE OBJECTIVES: Management guru Peter Drucker once observed that: “Unless a new venture develops into a business and makes sure of being ‘managed’, it will not survive…

Words 4509 - Pages 19

Essay about Celta Key

make sure you have them with you before lesson planning. Thanks WEEK 3 DAY 11 July 8 09:30 TP 4 12:00 TP 4 (No TPs tomorrow) 12:15 -13:00 FB 14:00-15:00 Context and memorability DAY 12 July 9 LRT Assignment due DAY 13 NO TP Mid-course tutorials Mid-course tutorials CATCH-UP – GET LESSON OUTLINES READY, PLEASE FB LP 15:15-16:15 TP group information exchange – COPY STAGE 2 SELF ASSESSMENT INTO CELTA 5 15.45 – 17.00 Phonology 2 – Connected Speech LRT Assignment 15:45-…

Words 15566 - Pages 63

FRA Coursehandbook FINAL Essay

Contents Page Contacts 2 Course Programme and assignment submission dates 3-5 City & Guilds 6302 Learning Pathway and Principal aims of the course 6 Assignment Criteria and tips for writing assignments, etc 6-8 City Lit Policies and Procedures 9-11 Recommended Reading 12 C&G Assignment Assessment Criteria 13-17 Pro forma 18-23 Contacts Centre for Teacher and Management Training, City Lit Course tutor Jennie Kitteringham…

Words 3861 - Pages 16

Essay on Information Technology Project Management Appendix Answers

Information Technology Project Management, Sixth Edition ISBN-10: 0324786921 ISBN-13: 9780324786927 Course Technology MIS Series Companion Web Site: www.cengage.com/mis/schwalbe Kathy Schwalbe, Ph.D., PMP Table of Contents CHAPTER 1 CHAPTER 2 CHAPTER 3 CHAPTER 4 CHAPTER 5 CHAPTER 6 CHAPTER 7 CHAPTER 8 CHAPTER 9 CHAPTER 10 CHAPTER 11 CHAPTER 12 APPENDIX A APPENDIX B APPENDIX C List of solution files available and referenced in this document, in alphabetical order: 2 4 6 7 14 20 24 29 32 35 37…

Words 19470 - Pages 78

2015 10 Week Pre Sessional Student S Handbook 2 Essay

PROGRAMME STUDENT’S HANDBOOK Contents 1 Programme description 1 2 Successful completion 1 3 Programme structure 2 4 Teaching schedules 3 5 Materials 3 6 Homework 4 7 Teaching and learning 4 8 Research project 5 8.1 Research project part 1: The written assignment 5 8.2 The written assignment schedule 6 8.3 Research project part 2: The oral presentation 6 8.4 Audience 7 8.5 Assessment 7 9 Deadlines 7 10 Being a pre-sessional student 7 11 Mobile phones and tablets 8 12 Student attendance, late arrivals…

Words 9401 - Pages 38

Guide for resume Essay

Resumes and cover letters For sample resumes, cover letters, and companion job descriptions, please see our online guide in the Handouts section of our website. For arts, acting, and academic resumes (C.V.s), please see our handout Specialized Resumes: The Arts and Academia. D R E W H A L L , N O R T H A M P T O N , M A 0 1 0 6 3 4 1 3 . 5 8 5 . 2 5 8 2 W W W . S M I T H . E D U / L A Z A R U S C E N T E R rev 08/13 L A Z A R U S @ S M I T H . E D U A Resume and Cover…

Words 6819 - Pages 28