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

Page views

64612

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READ - P2009 Sleep Q10B (PR404Q10B)

Data file: INT_COG12_DEC03

Overview

Valid: 92326

Invalid: 294403

Type: Discrete

Start: 155

End: 155

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
0	No credit	53462	57.9%
1	Full credit	36004	39%
r	Not reached	2860	3.1%
7	N/A	270370
9	Missing	24033

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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