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DETERMINATION THE SIZE OF SAMPLEBY JIJO VARGHESE
CONTENT Sample Sample size Characteristic of sample size Determination of sample size Determination of sample size th...
Sample:Sample “A small portion of the population which trulyrepresents the population with respect to the studycharacteris...
CHARACTERISTIC OF SAMPLE SIZE Large sample size ∝ Accuracy of sample result It doesn’t guarantee accuracy of result if ...
DETERMINATION OF SIZE OF SAMPLE Nature of universehomogenous or heterogeneoushomogenous – small sampleheterogeneous - lar...
CONT’D-Type of samplerandom sample is aptStandard of accuracy & acceptableconfidence levelLarge sample size is need Ava...
DETERMINATION OF SAMPLE SIZE THROUGH THEAPPROACH BASED ON PRECISION RATE ANDCONFIDENCE LEVEL
 Thanks
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determination of sample size

determination of sample size

  1. 1. DETERMINATION THE SIZE OF SAMPLEBY JIJO VARGHESE
  2. 2. CONTENT Sample Sample size Characteristic of sample size Determination of sample size Determination of sample size through the approachbased on precision rate and confidence level
  3. 3. Sample:Sample “A small portion of the population which trulyrepresents the population with respect to the studycharacteristics .” How much should be the small portion isdetermined by computing the Minimum Sample sizeNeed for sample size:Need for sample size Biological data is highly variableCrucial element in the planning of any research projecteconomy in terms of personnel, equipments, time andrelated aspects but ,not at the cost of a desiredprecision, confidence and power
  4. 4. CHARACTERISTIC OF SAMPLE SIZE Large sample size ∝ Accuracy of sample result It doesn’t guarantee accuracy of result if sample size (n) not be too small & too large
  5. 5. DETERMINATION OF SIZE OF SAMPLE Nature of universehomogenous or heterogeneoushomogenous – small sampleheterogeneous - large sample Number of classes proposedClass groups increasing sample size all increasing Nature of studyFor a continuous study sample size is small
  6. 6. CONT’D-Type of samplerandom sample is aptStandard of accuracy & acceptableconfidence levelLarge sample size is need Availability of financemoney availabilityDetermination of size of sample for large sample for largesample result in increasing the cost of sampling estimation Other considerationNature of units, Size of population ,Size of questionnaire ,availability of trained investigators &time
  7. 7. DETERMINATION OF SAMPLE SIZE THROUGH THEAPPROACH BASED ON PRECISION RATE ANDCONFIDENCE LEVEL
  8. 8.  Thanks

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