Programme for International Student Assessment 2009

Albania, Argentina, Australia...and 70 more, 2009 - 2010

Reference ID

WLD_2009_PISA_v02_M

Producer(s)

Organisation for Economic Co-operation and Development (OECD)

Metadata

Documentation in PDF DDI/XML JSON

Study website

Created on

Sep 05, 2014

Last modified

Jun 14, 2022

Page views

69659

Downloads

6052

READ - P2009 Dust Mites Q1 (R435Q01)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 61094

Invalid: 454864

Type: Discrete

Start: 138

End: 138

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
1	No credit	6809	11.1%
2	No credit	8550	14%
3	No credit	5504	9%
4	Full credit	34810	57%
8	Invalid	555	0.9%
9	Missing	1382	2.3%
r	Not reached	3484	5.7%
7	N/A	454864

Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.

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