Using the IEA IDB Analyzer Percentages & Means

ICCS 2009 IDB Workshop, 18th February 2010, Madrid

Using the IEA IDB Analyzer Percentages & Means


Table of contentPreparations– How to Start the Analysis Module– Overview of Analysis Methods

Percentages– Settings for the Analysis– Running the Analysis– Compare SPSS Output and International Report– Output in MS Excel

Percentages and Means– Settings for the Analysis– Running the Analysis– Compare SPSS Output and International Report– Output in MS Excel

Hands-On Training


To start the Analysis Module of the IDB Analyzer, select:Start > Programs > IEA > IDB Analyzer >

Analysis Module

How to Start the Analysis Module


How to Start the Analysis Module


Percentages onlyPercentages and meansCorrelationsRegressions

Analysis Methods





Hands-On Training


Choose variable(s) to be analyzed Load the SPSS Analysis FileChoose Percentages only as analysis type (some settings will be done automatically with respect to the datafile and the analysis method chosen)Select Variables from the datafile to be analyzed as Grouping VariableDefine location and name of the Output FilesStart SPSS and run analysis

Calculating Percentages


Student Questionnaire, Q20-A, p. 19Variable of Interest: IS2P20A

Select Variable of Interest


The analysis file needs to be loaded from the respective directoryCountries in the example analysis file:– Austria– Belgium (Flemish)– Bulgaria– Denmark– England– Estonia– Finland

The Analysis File


Select Analysis File:C:\ICCS2009\Work\ICG_ISG_INTC2.sav

Select Analysis Type: Percentages only

Select Grouping Variables:IS2P20A (Table 4.01 from ICCS2009

International report, first column)

[IDCNTRY] (Pre-selected if more than one

country is in file)

Percentages Only - Preparation


Select Analysis FileC:\ICCS2009\Work\ICG_ISG_INTC2.sav

Percentages Only - Details


1) Select Percentages only 2) Check Exclude Missing from Analysis




TOTWGTS

JKZONES

IDCNTRY



Search for IS2P20A



Search results will be displayed



Highlight variable

Use arrow key to add variable to

analysis



Define path and filename for output:

“C:\ICCS2009\Work\Table_4_01.*”

Change number of decimals to “1”



The IDB Analyzer creates SPSS Syntax and starts SPSSIn SPSS Syntax Editor Choose: Run > All


Percentages Only - Outcome

As a result the IDB Analyzer creates the following in the working directory (C:\ICCS2009\Work\):– SPSS Syntax file – contains the syntax with

the commands (*.sps)– SPSS Data file – contains statistics from the

analysis (*.sav)– MS Excel Output file – contains statistics

from the analysis (*.xls)


Percentages Only - SPSS Output


Number of

students in each group

List of countrie

s

Variable name and

Value Labels

Percentages Only - Excel Output



Total student weight – population estimate of the

groups defined by the grouping variables(IDCNTRY, IS2P20A)

Weighted percentage of students for the groups defined by

the grouping variables (IDCNTRY,

IS2P20A)


Standard error of

percentages






Hands-On Training


Without Achievement Scores– Computes the percentages of students within

specified subgroups, their mean and standard deviation on the continuous variable selected with their JRR standard errors

With Achievement Scores– Computes percentages and mean

achievement scores based on plausible values with their JRR standard errors

Calculating Percentages and Means


Choose variable(s) to be analyzed Load the SPSS Analysis FileChoose Percentages and Means as analysis type (some settings will be done automatically)Select Variables from the datafile to be analyzed as Analysis Variable OR Select the plausible values as Achievement ScoresDefine location and name of the Output FilesStart SPSS and run analysis

Calculating Percentages and Means


Variable of Interest

Civic and citizenship knowledge(represented with the 5 plausible values)PVCIV01-05


The analysis file needs to be loaded from the respective directoryCountries in the example analysis file:– Austria– Belgium (Flemish)– Bulgaria– Denmark– England– Estonia– Finland

The Analysis File


Select Analysis File:C:\ICCS2009\Work\ICG_ISG_INTC2.sav

Select Analysis Type: Percentages and Means

Select Achievement Scores: PVCIV01-05 (Table 3.4 from ICCS2009

International Report, column right of graph)

Percentages & Means - Preparation


Select Analysis FileC:\ICCS2009\Work\ICG_ISG_INTC2.sav

Percentages & Means - Details



1) Select Percentages and Means 2) Check Exclude Missing from Analysis 3) Check With Achievement Scores


TOTWGTS

JKZONES

IDCNTRY



Highlight variable

Use arrow key to add variable to

analysis



Change the number of decimals to

one

C:\ICCS2009\Work\Table_3_4.*



The IDB Analyzer creates SPSS Syntax and starts SPSSIn SPSS Syntax Editor Choose: Run > All



Percentages & Means – SPSS Output


List of countrie

s

Achievement scores

(PVCIV01-05)

Number of students in the sample

Total student weight – population estimate of the group defined by the grouping variable

(IDCNTRY)

Percentages & Means – Excel Output


Weighted percentage of

students for the groups defined by

the grouping variable (IDCNTRY)

Standard error of

percentage



Mean of the

analysis variable

Standard error of the mean of the

analysis variable

Standard deviation

of the analysis variable

Standard error of

the standard deviation



Percentages & Means – SPSS Output


Any Questions?

Thank you for your attention!





Hands-On Training


Hands-On TrainingA. Re-produce the presented example using

your country data- Percentage of students’ agreement to the right of expressing opinions freely (IS2P20A)

and/orB. Re-produce the presented example using

your country data- Mean civic and citizenship achievement of students (PVCIV01-05)

and/orC. Practice with own selected variables

following these analysis steps

Using the IEA IDB Analyzer Percentages & Means

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