discriminant analysis n.
Skip this Video
Download Presentation
Discriminant Analysis

Loading in 2 Seconds...

play fullscreen
1 / 17

Discriminant Analysis - PowerPoint PPT Presentation

  • Uploaded on

Discriminant Analysis. Introduction Types of DA Assumptions Model representation , data type/sample size Measurements Steps to solve DA problems An numerical example SPSS commands. (to p2). (to p3). (to p4). (to p5). (to p6). (to p10). (to p11). (to p16). Discriminant Analysis.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Discriminant Analysis' - lenka

Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
discriminant analysis
Discriminant Analysis
  • Introduction
  • Types of DA
  • Assumptions
  • Model representation, data type/sample size
  • Measurements
  • Steps to solve DA problems
  • An numerical example
  • SPSS commands

(to p2)

(to p3)

(to p4)

(to p5)

(to p6)

(to p10)

(to p11)

(to p16)

discriminant analysis1
Discriminant Analysis
  • is a powerful statistical tool used to study the differences between groups of objects
  • Here, objects could be
      • an individual person or firms, and
      • classifying them can be based on prior or posterior factors or characteristics

(to p1)

types of da
Two groups

refer to as two-group discriminant analysis

Its dependent variable is termed as dichotomous

Three or more group

Refer to as multiple discriminant analysis (MDA)

Its corresponding dependent variables are termed as multichotomous

Types of DA

(to p1)

1) multivariate normality,

uses the normal probability plot approach

uses the most common statistical tests are the calculation of skewness value

2) equal covariance matrices

Use covariance to check their corelations

3) multicollinearity, among independent variables

That is to check independent variables are not correlated to each other

4) Outliers

"the observations with a unique combination of characteristics identifiable as distinctly different from the other observations".


(to p1)

model representation
Model representation

Data type:

Dependent variables = non-metric format

Indep variables = metric format

Sample size : between 5-20 obs for each independent variables

(to p1)

  • Group categorizations
  • Hit ratio
  • Discriminating power

(to p7)

(to p8)

(to p9)

(to p1)

hit ratio
Hit ratio
  • Used to measure the model fitness
  • Is a maximum chance criteria

(to p6)

Note: We need to compute this value for our original sample size and then compare

to the value that produced by the SPSS; and computer value should not be less than

the formal value in order to claim the significant of fitness of model

discriminating power
Discriminating power

(to p6)

References: refer to “hit ratio” for details

steps to solve da problems
Steps to solve DA problems
  • Step 1: Assess the assumptions
  • Step 2: Estimate the discriminant function(s)

and its (their) significance

  • Step 3: Assess the overall fit

(to p1)


(to p12)

You can obtain this paper by clicking Discriminant paper from my web site

    • To discriminate the difference practices between the high and low performance of firms practicing TQM is ISF
    • Use score of overall satisfaction as a mean for discriminating factor
  • Steps:
    • Step 1, refer to p 762
    • Step 2, refer to p763
    • Step 3, refer to p763
    • Discussion, you can refer to the “discussion” section

(to p13)

(to p14)

(to p15)

(to p1)

spss commands
SPSS commands

(to p17)

SPSS Windows

spss windows
SPSS windows
  • Steps to compute Discriminant Analysis
  • Step 0
  • Prior the study of analysis, we need to firstly define a new variable as follows:
  • - Define “group” and assign a value of either 0, 1, 2 to them, as 0 as neural
  • Step 1
  • Select “Analyze”
  • Select “Classify”
  • Select “Discriminant”
  • click “group variable”
    • and select “group” variable as above
  • click “define range”
    • state its max and min ranges
    • (this range same as min=1, and max=2 for above case)
  • click “Independent”
    • select “variables”
    • that a group of factors that wish to be clustering
  • Click option “use stepwise method”
  • select “Statistics”

Learn from iconic base – Pls refer to my website