Computer Integrated assessment. Computer integrated assessment Tabulating and graphing of test data.

Slides:

Advertisements

Similar presentations

Methods for describing data. Methods of describing data Tables (row-coloumn table, contingency table, frequency distribution table) Graphs (line, bar,

Advertisements

Frequency Distributions and Graphs

Frequency Distributions and Graphs

Histograms, Frequency Polygons and Ogives

Unit 2 Section 2.1 – Day : Frequency Distributions and Their Graph  Graphs are used to present data after it has been organized into frequency.

Frequency Distributions

Organizing and Graphing Quantitative Data Sections 2.3 – 2.4.

Chapter 2 – Data Collection and Presentation

Step 1. Locate the interval containing the score that separates the distribution into halves. There are 100 scores in the distribution, so the 50 th score.

Frequency Distribution Ibrahim Altubasi, PT, PhD The University of Jordan.

Unit 2 Section : Histograms, Frequency Polygons, and Ogives  Graphs are used to present data after it has been organized into frequency distributions.

Frequency Distributions and Graphs

2.1: Frequency Distributions and Their Graphs. Is a table that shows classes or intervals of data entries with a count of the number of entries in each.

Frequency Distributions and Their Graphs

© The McGraw-Hill Companies, Inc., Chapter 2 Describing, Exploring and Comparing Data.

CHAPTER 2 Frequency Distributions and Graphs. 2-1Introduction 2-2Organizing Data 2-3Histograms, Frequency Polygons, and Ogives 2-4Other Types of Graphs.

Business Statistics, A First Course (4e) © 2006 Prentice-Hall, Inc. Chap 2-1 What is a Frequency Distribution? A frequency distribution is a list or a.

Chapter 02 McGraw-Hill/Irwin

Section 2.1: Frequency Distributions, Histograms and Related Topics

McGraw-Hill/Irwin Copyright © 2010 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 2 Describing Data: Frequency Tables, Frequency Distributions,

Classification and Tabulation of data

Chapter 2 Summarizing and Graphing Data Sections 2.1 – 2.4.

©The McGraw-Hill Companies, Inc. 2008McGraw-Hill/Irwin Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 3.

Frequency Distribution

 Frequency Distribution is a statistical technique to explore the underlying patterns of raw data.  Preparing frequency distribution tables, we can.

© The McGraw-Hill Companies, Inc., Chapter 2 Frequency Distributions and Graphs.

Frequency Distributions and Their Graphs Section 2.1.

2.1 F REQUENCY D ISTRIBUTIONS AND T HEIR G RAPHS CONTINUES …

Chapter 2 Data Presentation Using Descriptive Graphs.

Chapter Two Organizing and Summarizing Data 2.3 Organizing Quantitative Data II.

Statistics Workshop Tutorial 2

DESCRIPTIVE STATISTICS

Lesson Additional Displays of Quantitative Data.

Lecture 2.  A descriptive technique  An organized tabulation showing exactly how many individuals are located in each category on the scale of measurement.

Barnett/Ziegler/Byleen Finite Mathematics 11e1 Chapter 11 Review Important Terms, Symbols, Concepts Sect Graphing Data Bar graphs, broken-line graphs,

Chapter 3: Organizing Data. Raw data is useless to us unless we can meaningfully organize and summarize it (descriptive statistics). Organization techniques.

©The McGraw-Hill Companies, Inc. 2008McGraw-Hill/Irwin Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Histograms, Frequency Polygons, and Ogives. What is a histogram?  A graphic representation of the frequency distribution of a continuous variable. Rectangles.

Histograms, Frequency Polygons, and Ogives

Methods for Describing Quantitative Data

Chapter 2 Descriptive Statistics 2.1 Frequency Distributions and Their Graphs.

Determining the intervals (official procedure!): 1.Decide on the number of classes – typically between 5 and 15 2.Determine class width: range / # of.

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2 Copyright © 2011 by the McGraw-Hill Companies, Inc. All.

Draw, analyze, and use bar graphs and histograms. Organize data into a frequency distribution table The Frequency Distribution.

SUBTOPIC 8.2 : Frequency Distributions. (a) Clarify the important terms in the construction of frequency table; class interval, class limit, class boundary,

Chapter 2 Frequency Distribution and Graph

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Chapter 2 Descriptive Statistics.

Chapter 2 Descriptive Statistics.

Describing, Exploring and Comparing Data

Frequency Distributions

BUSINESS MATHEMATICS & STATISTICS.

Frequency Distributions and Graphs

You will need your calculator today (and every day from now on)

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Classification and Tabulation of data

Frequency Polygons and Ogives

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Histograms , Frequency polygons and Ogives

Histograms, Frequency Polygons and Ogives

Frequency Distributions and Graphs

Organizing and Displaying Data

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Descriptive Statistics

Descriptive Statistics

The Frequency Distribution

Descriptive Statistics

Frequency Distributions

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation Chapter 2.

Presentation transcript:

Computer Integrated assessment

Computer integrated assessment Tabulating and graphing of test data

Tabulating of data Graphing of data

Tabulating of data Reason for tabulating Listing Simple frequency distribution Tabulating & Graphing Grouped frequency distribution

Reason for tabulating data To make sense of data Can you make sense of this data? Tabulating

One way to tabulate data. List data in an ascending sequence. List data in a descending sequence. Listing of data Ascending sequenceDescending sequence Tabulating

Simple frequency distribution XfXfXfXfXfXf Tabulating

Grouped frequency distribution Step 1: Determine the range of scores R = highest score - lowest score R = 96 – 27 = 69 Step 2: Determine number of intervals Step 3: Divide the range by the number of intervals and round to an odd number i = R = 69/10 = 6,9 (7) number of intervals Step 4: Construct the interval column Step 5: Construct the frequency column Tabulating

Grouped frequency distribution Lower limit (LL) Upper limit (UP) Highest score; eliminate intervals above Lowest score; eliminate intervals belowIntervals 91 – – – – – – – – – Lower limit is a multiple of the interval width. Upper limit is one point less than the lower limit of the next interval. Interval column Step 4: Construct the interval column Tabulating

IntervalTallyf Frequency with Excel Step 5: Construct the frequency column Grouped frequency distribution

Graphing of test data The histogram The frequency polygon The cumulative frequency polygon Tabulating & Graphing

The histogram The histogram is based on the grouped frequency distribution. Intervalf f Interval Histogram of test scoresGrouped frequency distribution Graphing

The frequency polygon The graph is straight line connecting the midpoint of each interval. Midpoint Frequency polygon of test scoresGrouped frequency distribution IntervalMidpointf Midpoint (MP) = LL + UL 2 f Graphing

The cumulative frequency polygon The cumulative frequency polygon is based on the cumulative frequency distribution. IntervalMidpointfcf Cumulative frequency distribution Cumulative frequency polygon (OGIVE) Upper level cf GraphingAlternative tutorial