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

36435

Downloads

4577

READ - P2009 Acne Vulgaris Q1 (R447Q01T)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 97433

Invalid: 418525

Type: Discrete

Start: 156

End: 156

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
0	No credit	2235	2.3%
1	No credit	10612	10.9%
2	No credit	22064	22.6%
3	Full credit	60909	62.5%
8	Invalid	16	0%
9	Missing	857	0.9%
r	Not reached	740	0.8%
7	N/A	418525

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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