2.1: Anthropometric Indicators Measurement Guide - Linkages Project

9.
Sampling error - The difference between
the results obtained from a survey sample
and those that would have been obtained
if the entire population was surveyed. The
size of sampling error varies both with the
size of the sample and with the
percentages giving a particular response.
Screening - The practice of distinguishing
between individuals who should be
enrolled in a program/intervention and
those who should not be enrolled; a tool
for identifying individuals at risk; to
examine carefully to determine suitability.
Self-selection - The act whereby
individuals determine their participation
in some activity or event, because of
underlying values, characteristics or
circumstances.
Simple cross-section survey - A survey
that collects data using random sampling;
a survey that gives all individuals or
household in the study area an equal
chance of being chosen for the survey.
Simple random sample - The results of a
method of sampling that gives everyone
an equal chance of being selected; the
simplest form of probability sampling; a
sample in which an individual’s selection
is independent of the selection of any
other individual.
Skewed distribution - A distribution in
which one side is unequal to the other
side; a distribution in which the two sides
do not mirror each other across the center
line of the mean.
Skinfold calipers - A tool used to assess
skinfold thickness by measuring the
thickness of the skin pinched between its
prongs.
Skinfold thickness - A measurement that
provides an estimate of subcutaneous fat
deposits, which in turn provides
information on total body fat.
Specificity - Characteristic of a
classification system that correctly
identifies children who are not at risk; the
probability that a healthy individual will
be classified as healthy; a system with few
false positives.
Spring scale - A scale that measures
weight by the amount a spring is pulled by
the object being weighed; a hanging scale.
Standard deviation - A statistical
measure of dispersion away from the
mean; the square root of the variance.
Stratified sample - A method of sampling
that ensures proportional representation
from all sub-groups or strata.
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