Probability And Non-Probability
- 1. Presented By (Group – 2( Quantitative Methods For Business Management WISE COLLEGE Date: 14th Jan 2018
- 2. Group (2) Member ListGroup (2) Member List Aung KhineAung Khine Kaung Myat TunKaung Myat Tun Kyi LinKyi Lin Kyaw ThuyaKyaw Thuya Hnin Nway AungHnin Nway Aung Hnin New HlaingHnin New Hlaing Kay Thi KyawKay Thi Kyaw Hsu ThakhinHsu Thakhin Moe Hnin PhyuMoe Hnin Phyu Nilar WinNilar Win Soe Soe NyeinSoe Soe Nyein
- 3. Important statistical termsImportant statistical terms Population:Population: a set which includes alla set which includes all measurements of interestmeasurements of interest to the researcherto the researcher (The collection of(The collection of allall responses, measurements,responses, measurements, or countsor counts that are of interest(that are of interest( Sample:Sample: A subset of the populationA subset of the population
- 4. Why samplingWhy sampling?? Get information about large populationsGet information about large populations Less costs Less field time More accuracy i.e. Can Do A Better Job ofCan Do A Better Job of Data CollectionData Collection When it’s impossible to study the whole population
- 5. Types of samplingTypes of sampling (1( Probability samples (2( Non-probability samples
- 6. Classification of Sampling Methods Sampling Methods Probability Samples Non Probability Quota Judment Convenience Snowball SystematicSimple random Srratified ClusterMultistage
- 7. Methods used in probabilityMethods used in probability samplessamples Simple random samplingSimple random sampling Systematic samplingSystematic sampling Stratified samplingStratified sampling Multi-stage samplingMulti-stage sampling Cluster samplingCluster sampling
- 9. ““Ratio between sample size and population size”Ratio between sample size and population size” Systematic sampling
- 11. Stratified SamplingStratified Sampling Example: -Sampling fish from a stream with the goal being to estimate the average length of trout.
- 13. MULTISTAGE SAMPLING -First stage , random number of districts chosen in all states. -Followed by random number of villages. -Then third stage units will be house. -All ultimate units (houses) selected at step are surveyed.
- 14. MULTISTAGE SAMPLING Stage 1:Countries Stage 2:Segments Stage 3:Households Stage 4:Individuals
- 15. Cluster samplingCluster sampling “A group of sampling units close to each other.” - i.e. crowding together in the same area or neighborhood
- 16. Cluster samplingCluster sampling Section 4 Section 5 Section 3 Section 2Section 1
- 17. Non probability samplesNon probability samples Quota Sampling Probability of being chosen is unknown. Judgemental sampling Form of convenience sampling in which the population elements are selected based on the judgment of the researcher. Snowball Sampling Selecting participants by finding one or two participants and then asking them to refer you to others. Convenience Sampling simply use results that are readily available.
- 21. Convenience SamplingConvenience Sampling Hey! Do you believe in love at first sight?