Writing Errands

I will pay for the following essay The Problem Of Planning. The essay is to be 4 pages with three to five sources, with in-text citations and a reference page.
In statistical terms, random sample means the set of items that are drawn from a large set of items (population) and it is the subset of the population. The method of sample satisfies the criterion of randomness, that is, each item has equal chance to be drawn or selected. The only factor an item to be selected is mere chance. But in order to ensure the equal chance to all items, once an item is selected, it should be replaced by the population.
If the population consists of heterogeneous subgroups or different strata, it would be advisable to sample each subpopulation (stratum) separately. Stratification is the process of grouping members into relatively homogenous groups. The random sampling is applied within each stratum. This method of random sampling from different strata improves the representative nature of the sample by reducing the sampling error.

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