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

69652

Downloads

6052

READ - P2009 Sleep Q3 (R404Q03)

Data file: INT_COG09_TD_DEC11

Overview

Valid: 157439

Invalid: 358519

Type: Discrete

Start: 101

End: 101

Width: 1

Range: -

Format: character

Questions and instructions

Categories

Value	Category	Cases
1	Full credit	105433	67%
2	No credit	19225	12.2%
3	No credit	8020	5.1%
4	No credit	15252	9.7%
8	Invalid	1303	0.8%
9	Missing	4195	2.7%
r	Not reached	4011	2.5%
7	N/A	358519

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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