As an estimator of the population mean, the sample mean based only on the distinct units possesses a remarkable invariance property. Under three forms of simple random sampling, viz. simple random ...

The results obtained by the authors so far on controlled sampling with equal probabilities and without replacement have been consolidated in this paper in an integrated fashion. Utilizing these ...

Consider a population of 70 individuals, for which you wish to estimate the mean annual income, μ. Assume that you have decided to use the following estimation procedure to make your estimate: simple ...

Consider a population of 70 individuals, for which you wish to estimate the mean annual income, μ. Assume that you have decided to use the following estimation procedure to make your estimate: simple ...

What is the difference between representative samples and random samples, and how are they are used to reduce sampling bias?

After distributing test kits to 60 randomly selected households, Blue Island officials say the results found no immediate concern.

Stratified random sampling is a method of sampling that divides a population into smaller groups that form the basis of test samples.