non-sample error
1Non-Sampling Error — A statistical error caused by human error to which a specific statistical analysis is exposed. These errors can include, but are not limited to, data entry errors, biased questions in a questionnaire, biased processing/decision making,… …
2Non-sampling error — In statistics, non sampling error is a catch all term for the deviations from the true value that are not a function of the sample chosen, including various systematic errors and any random errors that are not due to sampling.[1] Non sampling… …
3Sample size determination — is the act of choosing the number of observations to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample …
4sample selection bias — Non random selection is both a source of bias in empirical research and a fundamental aspect of many social processes. When observations in social research are selected so that they are not independent of the outcome variables in a study, sample… …
5Non-revenue water — (NRW) is water that has been produced and is “lost” before it reaches the customer. Losses can be real losses (through leaks, sometimes also referred to as physical losses) or apparent losses (for example through theft or metering inaccuracies).… …
6Non-response bias — occurs in statistical surveys if the answers of respondents differ from the potential answers of those who did not answer. Contents 1 Example 2 Test 3 Related terminology 4 See also …
7Sample size — The sample size of a statistical sample is the number of observations that constitute it. It is typically denoted n , a positive integer (natural number).Typically, all else being equal, a larger sample size leads to increased precision in… …
8error (sampling and non-sampling) — There are many sources of inaccuracy, or error, in a survey. Sampling error consists of bias in sample selection procedures, plus random sampling error. Non response bias can be measured and analysed after interviewing is completed. There is… …
9Margin of error — This article is about the statistical precision of estimates from sample surveys. For safety margins in engineering, see Factor of safety. For tolerance in engineering, see Tolerance (engineering). Not to be confused with Margin for Error. The… …
10Sampling error — Contents 1 Description 1.1 Random sampling 1.2 Bias problems 1.3 Non sampling error 2 See also …
