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

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36664

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READ - P2009 Acne Vulgaris Q6 (R447Q06)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 97427

Invalid: 418531

Type: Discrete

Start: 159

End: 159

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
0	No credit	32938	33.8%
1	Full credit	44462	45.6%
9	Missing	19066	19.6%
r	Not reached	961	1%
7	N/A	418531

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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