Purposive or judgement sampling, Applied Statistics

Assignment Help:

Purposive or Judgement Sampling

Under this method of sampling, the choice  of selection of sample  items from the universe  depends exclusively on the judgement  of the investigator. For example, if 10 students form a class  of 60 students  are to be selected for the survey of  spending habits of students the 10 items  may be selected by the investigator  himself which he considers to  be representative of the whole class.

Merits:

(1)   Where small number of units is in the inverse, random selection may miss the vital elements, but this method of sampling would surely include them in a simple.

(2)   Where an investigator wishes to study some unknown traits of the universe and some of which are know. Thus  he will  stratify  the universe  according  to known elements to select  sample units form  each  stratum on the    basis  of judgement  as such   this method is used obtain  more  representative sample.

(3)   This method saves time and money both   as public officials are often pressed for time.

Limitations:

This method is unscientific since the units selected from the universe may be affected by personal bias.

The success of this method depends upon excellence in judgement, if the investigator has no good judgement, sample will not be representative. The conclusions based on sample will be wrong and erroneous.


Related Discussions:- Purposive or judgement sampling

Techniques, Q. 1 a) Describe the important quantitative techniques used in ...

Q. 1 a) Describe the important quantitative techniques used in public system management. (10) b) Do you think the day will come when all decisions are made with the assistance of

Business staitistices- soltion to :, A file on DocDepot in the assignments ...

A file on DocDepot in the assignments folder on doc-depot called bmi.mtp contains data on the Body Mass Index (BMI) of a population of Ottawa residents. The first column identifies

Different analyses of recurrent events data, Different analyses of recurren...

Different analyses of recurrent events data: The bladder cancer data listed in Wei, Lin, and Weissfeld (1989) is used in Example 54.8/49.8 of SAS to  illustrate different anal

Problem on standard deviation, Your organization purchases bottles of ...

Your organization purchases bottles of a popular commercial solvent for resale.  Each bottle is labeled as containing 32 fluid ounces of the solvent.  Your cont

Chi-square analysis, Chi-square analysis can be used with both Goodness-of-...

Chi-square analysis can be used with both Goodness-of-Fit Tests and with Tests for Independence. There are specific instances when each test should be used based on the information

Median for ungrouped data, If the data set contains an odd number of items,...

If the data set contains an odd number of items, the middle item of the array is the median. If there is an even number of items, the median is the average of the two items. If the

Interpolation and extrapolation, Meaning of Interpolation and Extrapolation...

Meaning of Interpolation and Extrapolation Interpolation is a method of estimating the most probable  missing figure on  the basis of given data under certain assumptions. On t

Age at first marrage, get a questionnaire that captured age at first marria...

get a questionnaire that captured age at first marriage

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd