NUR 80A/B Lecture Notes - Lecture 8: Statistical Conclusion Validity, Sampling Bias, Nonprobability Sampling
19 Oct 2015
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Week 8 research readings chapter 12. That are accessible to the researcher as a pool of subjects. Samples and sampling: sampling is the process of selecting a portion of the population to represent the entire population. Sample is a subset of the population: work with samples than populations becaue it is more practical, quantitative studies: no method of showing that sample is representative; Effected by homogeneity; may be safe to assume a reasonable degree of homogeniety (eg. blood in a person"s veins is relatively homogenous, hence single blood sample chosen haphazardly from a patient is adequate for clinical purpose) Many attritubes are not homogenous like age, bp, stress level. Strata: strata are mutually exclusive segments of a population based on a specific trait. For instance, a population consisting of all rns in ontario could be divided into two strata based on gender. in quantitative studies =enhance representativeness.
