Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Performing ANOVA in SPSS and Checking Assumptions: A Comprehensive Guide, Slides of Economic statistics

A step-by-step guide on how to perform a simple analysis of variance (anova) in spss and check the assumptions. The example uses the prices of a commodity in different cities as a case study. The assumptions of anova, the process of performing anova in spss, and checking the assumptions using spss.

Typology: Slides

2011/2012

Uploaded on 11/10/2012

dipen
dipen 🇮🇳

4.4

(75)

141 documents

1 / 9

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Analysis of variance
Docsity.com
pf3
pf4
pf5
pf8
pf9

Partial preview of the text

Download Performing ANOVA in SPSS and Checking Assumptions: A Comprehensive Guide and more Slides Economic statistics in PDF only on Docsity!

Analysis of variance

Learn How to Perform a Simple ANOVA in SPSS and How to Check the Assumptions

Assumptions.

  1. Each group is an independent random sample from a normal population.
  2. Analysis of variance is robust to departures from normality
  3. The groups should come from populations with equal variances.

Analysis of Variance

Analysis of variance, or ANOVA, is a method of testing the null hypothesis that several group means are equal in the population, by comparing the sample variance estimated from the group means to that estimated within the groups.

A descriptive exploration

N = 8 7 6 5

City

A B C D

Price of commodity 1

50

40

30

Learn How to Perform a Simple ANOVA in SPSS and How to Check the Assumptions

Data are stored in the file “prices by city - anova example 1.sav”

Use the menu Analyze/General Linear, Model/Univariate

In the Univariate dialog box

Select the Price1 for the Dependent Variable

Select the City as the Fixed Factor(s)

  • Click on the Save button

Under Predicted Values check Unstandardized

Under Residuals check Standardized

Click Continue

Click OK

Learn How to Perform a Simple ANOVA in SPSS and How to Check the Assumptions

Between-Subjects Factors

A 8

B 7

C 6

D 5

City

Value Label N

Tests of Between-Subjects Effects Dependent Variable: Price of commodity 1

315.574 a^3 105.191 55.746. 41585.412 1 41585.412 22038.273. 315.574 3 105.191 55.746. 41.513 22 1. 42814.267 26 357.088 25

Source Corrected Model Intercept CITY Error Total Corrected Total

Type III Sum of Squares df Mean Square F Sig.

a.R Squared = .884 (Adjusted R Squared = .868)

Checking assumptions

Predicted Value for PRICE

36 38 40 42 44 46 48 Standardized Residual for PRICE

.

-. -1. -1. -2.

GRAPH

/SCATTERPLOT(BIVAR)=pre_1 WITH zre_ /MISSING=LISTWISE.