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Revisiting Sampling Concepts
Population ,[object Object],[object Object],[object Object],[object Object],[object Object]
Sample ,[object Object],[object Object],[object Object],[object Object],[object Object]
Population Sample Sample  Statistics Population Parameters Inference Samples are drawn to infer something about population
Reasons to Sample ,[object Object],[object Object],[object Object],[object Object],[object Object]
Probability Vs Non Probability Sampling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Probability Vs Non Probability Sampling ,[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sampling Error ,[object Object],[object Object],[object Object],[object Object],[object Object]
Validity of Sampling Process
Sampling Distributions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Sampling Distribution of Means ,[object Object],[object Object],[object Object],[object Object],[object Object]
Distribution of the Population
Sampling distribution of means n = 2
= µ   = 0.6 3 3,3 9 2 Mean of SD 2.5 3,2 8 2 3,1 7 2.5 2,3 6 2 2,2 5 1.5 2,1 4 2 1,3 3 1.5 1,2 2 1 1,1 1 Sample Mean Sample Sample #
 
[object Object],[object Object],0.6 < 0.8 = µ   <
[object Object],[object Object]
Central Limit Theorem …… ,[object Object],[object Object],[object Object],[object Object]
Central Limit Theorem …… ,[object Object],[object Object],[object Object]
 
Implications of CLT ,[object Object]
Implications of CLT Cont ,[object Object],[object Object],[object Object],[object Object],=
54 o -2.35 0.0094 52
[object Object],[object Object],[object Object],[object Object]
What can go wrong  ,[object Object],[object Object],[object Object],[object Object],[object Object]
How to do it rightly ,[object Object],[object Object],[object Object],[object Object],[object Object]

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Sampling 1231243290208505 1