Trends in International Mathematics and Science Study 2015

International, 2015

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Reference ID

int-iea-timss-2015-v1

Producer(s)

TIMSS & PIRLS International Study Center

Collections

TIMSS and PIRLS

Metadata

DDI/XML JSON

Created on

Mar 20, 2021

Last modified

Mar 20, 2021

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311737

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2537

GEN\MONTHS OF EXTRA LESSONS\SCIENCE (ASBH10BB)

Data file: timss-2015-pop1-num-bg-hm-allcountries-metadata

Overview

Valid: 787

Invalid: 213

Type: Discrete

Decimal: 0

loc_start_pos: 75

loc_end_pos: 75

Width: 1

Range: 1 - 4

Format: Numeric

Questions and instructions

Categories

Value	Category	Cases
1	Did not attend	593	75.3%
2	Less than 4 months	91	11.6%
3	4-8 months	55	7%
4	More than 8 months	48	6.1%
Sysmiss		213

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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