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

36665

Downloads

4577

READ - P2009 Acne Vulgaris Q5 (R447Q05)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 97427

Invalid: 418531

Type: Discrete

Start: 158

End: 158

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
1	Full credit	74784	76.8%
2	No credit	13532	13.9%
3	No credit	2748	2.8%
4	No credit	1822	1.9%
8	Invalid	2481	2.5%
9	Missing	1177	1.2%
r	Not reached	883	0.9%
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.

Back to Catalog