I've included a couple of links. Statistical theory can never tell you how many samples you must take, all it can tell you the expected error that your sample should have given the variability of the data.
Worked in reverse, you provide an expected error and the variability of the data, and statistical theory can tell you the corresponding sample size.
The calculation methodology is given on the related links.
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It is the number of elements in the sample. By contrast, the relative sample size is the absolute sample size divided by the population size.
According to the website Survey System's Creative Research Systems page, you can use a sample size calculator to determine how many people need to be interviewed in order to meet your target.
a sample is a sample sized piece given... a sample size is the amount given in one sample
Answer D- A higher sample size gives more accurate results- APEX LEARNING
sample size is the specific size of a thing like the how long or wide. while sample unit is the whole thing not referring to specific number size.