Multi stage or cluster random sampling, Applied Statistics

Multi stage or Cluster Random sampling

 Under this method, the random selection is made of primary, intermediate and final units from a given population. The area of investigation is scientifically restricted to a small number of ultimate units which are representative of the whole. This will reduce the cost compared with a simple sampling from the whole area with a number of straight random selections. For example, from a population of a climatic region of the eastern states the two and south eastern from within each of these primary sampling areas a certain number of blocks May e selected are random or ultimate selection of the village for complete enumeration of households. At each stage there is a random selection and the size of sample may be proportional or disproportional depending on the size variations relevant to the purpose of inquiry.

Merits:

(1)    It introduces flexibility in the sampling method which is lacking in other methods.

(2)    This method is very helpful in large scale investigations where the preparation of list of all units of the universe is very difficult and expensive. For example  in a socio  economic survey certain families are to be selected  from different village different villages are to be selected from the list of districts  of a state  which are given ,This  is  a case of three stage sampling. It will consume time and money in the selection of items from the population.

(3)    This method is useful in such cases where sub division into second stage units be carried out only for such first stage units which are included in the sample.

Limitations:

A multi stage sample is usually less accurate than a sample containing the same number of final stage units selected by means of suitable multi stage process.

Posted Date: 9/26/2012 7:26:31 AM | Location : United States







Related Discussions:- Multi stage or cluster random sampling, Assignment Help, Ask Question on Multi stage or cluster random sampling, Get Answer, Expert's Help, Multi stage or cluster random sampling Discussions

Write discussion on Multi stage or cluster random sampling
Your posts are moderated
Related Questions
Is the random vector (Trunk Space, Length, Turning diameter) of US car normally distributed? Why? If yes, find the unbiased estimators for the mean and variance matrix of (Trunk Sp

Test for Equality of Proportions For example, we may want to test whether the percentage of smokers (p 1 ) among the males equals the percentage of female smokers (p 2 ). W

QUESTION ONE. (a) The probability that, a bomber hits a target on a bombing mission is 0.70 Three bombers are sent to bomb a particular target. (i) What is the probability

Histogram: It is generally used for charting continuous frequency   distribution. In histogram, data are plotted as a series  of rectangle one over the other. Class intervals

find the expected value of the mean square error and of the mean square reggression

1. Recognize and explain the opportunities for statistical learning. 2. Describe how the use of statistics supports student learning. 3. Recognize appropriate data displays a

slope parameter of 1.4 and scale parameter of 550.calculate Reliability, MTTF, Variance, Design life for R of 95%

Education seems to be a very difficult field in which to use quality methods. One possible outcome measures for colleges is the graduation rate (the percentage of the students matr

A researcher computed the F ratio for a four-group experiment. The computed F is 4.86. The degrees of freedom are 3 for the numerator and 16 for the denominator. 1. Is the computed

The manager of Pizza Hut provides a delivery service for customers who telephone in an order. The manager would like to give callers an idea of the time it will take to deliver an