Sampling Methods Sampling Methods Sampling is some how similar to research but generally we use sampling as compare to research. The reason behind this is that we can easily collect data in sampling, it is very much cost effective and in this we collect data as small sets so it ensures similarity and accuracy of data. Generally we use two sampling methods i.e. Probability sampling and Non-Probability sampling. Both these techniques are future divided in different parts Probability Sampling Methods: In this method each sample has same probability i.e. each sample can be chosen same time. The Probability sampling method is future divided in few techniques they are given as:A simple random sample: In this sample is obtained randomly by choosing elementary units in such a way that each unit of the population has same number of chance of being selected. In random techniques the total , average and proportion values can be calculated using the following formulas that are given as: n For calculation of total value we use: X = N ∑ (Xi / n).
Know More About :- Conversion Temperature Math.Tutorvista.com
Page No. :- 1/4
i=1 n Average is calculated using formula given as: A = ∑ (Xi / n) i=1
n Proportion is given as: P = ∑ (Pi/n) i=1
A stratifies sample: this sample is obtained by independently selecting a separate sample from a population. In stratifies technique we again use three formula for calculating average, total and proportion. k Average is calculated using: X = ∑ (wh Xh). h=1
k
Total samples can be calculated using formula: X = ∑ (Nh Xh) h=1
k Proportion is given as: P = ∑ (h Ph) h=1
Learn More :- Thermodynamics Equations Math.Tutorvista.com
Page No. :- 2/4
A cluster sample: In this sampling method, we get sample by selecting different clusters from the population using simple random sampling. Non- Probability sampling methods: In this the probability of occurrence of any sample is not same i.e. each sample can be chosen different number of times. This is again divided in sub techniques they are given as:Convenience sampling: This method is cheapest and quickest in this main question is that who is available. The Judgement sample: In this we obtain the sample according to the discretion of someone who is familiar with the proper characteristics of the population. We can use all the above mentioned methods to calculate the sampling of population. From both the methods i.e. probability sampling and non-probability sampling are employed to guide practice. Sampling has wide application in many field like in the medical research, engineering, science as we can easily gather various information’s about population. This is all about statistical methods which we can use to calculate sampling. Using this method we can easily and fastly calculate samples and the best part of sampling techniques is that it is cost effective.
Math.Tutorvista.com
Page No. :- 4/4
Thank You For Watching
Presentation