Sampling Designggggfgggfggggg (1) (1).pptx
- 1. SAMPLE DESIGN Steps in Sampling Design
- 2. Sample 🞂 The sample should be representative of the population Sample Population or Universe
- 3. SAMPLE DESIGN 🞂 A sample design is a definite plan for obtaining a sample from a given population. 🞂 It refers to the technique or the procedure the researcher would adopt in selecting items for sample. 🞂 It is an important part of a research design or plan.
- 4. Steps in Sampling Design rs e 1. Define the population or unive 2.State the sampling frame 3.Identify the sampling unit 4.State sampling method 5.Determine the sample size 6.Spell out the sampling plan 7. Select the sample
- 5. Define the population or Universe 🞂 It is the first step in developing any sample design. 🞂 The set of objects technically called universe is clearly defined. 🞂 The universe can be finite or infinite. 🞂 In finite universe the number of items is limited. 🞂 In the case of infinite universe the number of items is infinite. That means we can't measure the number of units. E.g. number of stars in the sky.
- 6. State the sampling frame 🞂 After defining the population the sampling frame is to be stated. 🞂 It is the source list from samples is to draw. 🞂 It contains the names of all items of the universe. 🞂 It is the means of representing the elements of the population. E.g. telephone book, directory etc.
- 7. Identify the sampling unit 🞂 A decision related to sampling unit is to be taken before selecting sample for study. 🞂 Sampling unit (e.g. state, village etc) may be geographical one or a social unit (e.g. a school or club). 🞂 The researcher should select one or more of the sampling unit.
- 8. State sampling method 🞂 There are number of methods used for selecting samples. 🞂 It includes probability sampling methods, non- probability sampling methods. 🞂 Out of this the researcher should select one method by which sampling units are to be selected.
- 9. Determine the sample size 🞂 This refers to the number of items to be selected from the universe. 🞂 The sample size should not be large or small. It should be optimum.
- 10. Spell out the sampling plan 🞂 In this stage the researcher should state the operational procedures for selection of the sample. 🞂 That means he should decide the techniques, which are used in selecting the item of sample. In fact it is the sample design.
- 11. Select the sample 🞂 It is the last step.The needed samples are to be selected. 🞂 The office and fieldwork is required to carry out the selection of the sample.
- 12. Features of a Good Sample Design 🞂 The outcome of a good Sample design must be a truly representative sample. 🞂 The selected sample design should not cause more errors. 🞂 Sample design should be viable on the basis of budget constraints. 🞂 A good sample design is able to control systematic bias effectively.