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

69670

Downloads

6052

READ - P2009 Acne Vulgaris Q4 (R447Q04)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 97425

Invalid: 418533

Type: Discrete

Start: 157

End: 157

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
1	No credit	20069	20.6%
2	Full credit	51517	52.9%
3	No credit	14456	14.8%
4	No credit	7368	7.6%
8	Invalid	1467	1.5%
9	Missing	1445	1.5%
r	Not reached	1103	1.1%
7	N/A	418533

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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