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
Created on
Sep 05, 2014
Last modified
Jun 14, 2022
Page views
100335
Downloads
24144
READ - P2009 Sleep Q6 (PR404Q06)
Data file: INT_COG12_DEC03
Overview
Valid:
113482
Invalid:
273247
Type:
Discrete
Start:
152
End:
152
Width:
1
Range:
-
Format:
character
Questions and instructions
Categories
| Value | Category | Cases | |
|---|---|---|---|
| 1 | No credit | 48957 |
43.1%
|
| 2 | Full credit | 50191 |
44.2%
|
| 3 | No credit | 8408 |
7.4%
|
| 4 | No credit | 3889 |
3.4%
|
| r | Not reached | 2037 |
1.8%
|
| 7 | N/A | 270364 | |
| 8 | Invalid | 965 | |
| 9 | Missing | 1918 |
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.