Programme for International Student Assessment 2012

Albania, United Arab Emirates, Argentina...and 57 more, 2012

Reference ID

WLD_2012_PISA_v01_M

Producer(s)

Organisation for Economic Co-operation and Development

Metadata

Documentation in PDF DDI/XML JSON

Created on

Sep 05, 2014

Last modified

Jun 14, 2022

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READ - P2009 Sleep Q10A (PR404Q10A)

Data file: INT_COG12_DEC03

Overview

Valid: 93807

Invalid: 292922

Type: Discrete

Start: 154

End: 154

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
0	No credit	46703	49.8%
1	Full credit	44830	47.8%
r	Not reached	2274	2.4%
7	N/A	270371
9	Missing	22551

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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