Trends in International Mathematics and Science Study 2015

International, 2015

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Reference ID

int-iea-timss-2015-v1

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TIMSS & PIRLS International Study Center

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TIMSS and PIRLS

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Mar 20, 2021

Last modified

Mar 20, 2021

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BALANCE AFTER HCL-NAOH ARE MIXED (1) (S042104)

Data file: TIMSS-2015-pop2-studen-achievement-allcountries-metadata

Overview

Valid: 142

Invalid: 858

Type: Discrete

Decimal: 0

loc_start_pos: 376

loc_end_pos: 376

Width: 1

Range: 1 - 5

Format: Numeric

Questions and instructions

Categories

Value	Category	Cases
1	CORRECT RESPONSE	33	23.2%
2	CORRECT RESPONSE_duplicated_11	1	0.7%
3	INCORRECT RESPONSE	45	31.7%
4	INCORRECT RESPONSE_duplicated_71	27	19%
5	INCORRECT RESPONSE_duplicated_79	36	25.4%
Sysmiss		858

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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