PowerPoint Presentation:
Sampling : “ Sampling is a careful selection of individuals that allows researchers to generalize their research finding on the whole population ” As David S. Fox “ In the social sciences, it is not possible to collect data from every respondent to collect data a from every respondent relevant to our study but if only from some factorial Part of the respondent. The process of selecting the factorial parts is called sampling. ”
Advantages Of Sampling. Four main advantages of sampling is. 1.The cost is lower. 2.Data collection is faster. 3.Since the data set is smaller it is possible to insure homogeneity and to improve the accuracy and quality of data. 4.The most important advantage of sampling is that it provides a valid measure of reliability for the sample estimates and this is one of the two basic purposes of sampling.:
Advantages Of Sampling . Four main advantages of sampling is. 1.The cost is lower. 2.Data collection is faster. 3.Since the data set is smaller it is possible to insure homogeneity and to improve the accuracy and quality of data. 4.The most important advantage of sampling is that it provides a valid measure of reliability for the sample estimates and this is one of the two basic purposes of sampling.
SAMPLING :
SAMPLING Population Sample
SAMPLING PROCESS:
SAMPLING PROCESS Determine if a probability or non-probability sampling method will be chosen Select a Sampling Frame Define the Target population Determine sample size Select actual sampling units Conduct fieldwork 3 2 1 7 6 5 4 Plan procedure for selecting sampling units
WHEN IS SAMPLING UNNECESSARY::
WHEN IS SAMPLING UNNECESSARY: The number of things we want to sample are small Data is easily accessible Data quality is unaffected by the number of things we look at EXAMPLE You are interested in the relationship between team batting average and winning % of major league baseball team There are only 30 major league teams Data on team batting average and winning % are readily available.