Data Collection. Sampling. Target Population. The group of people to whom the researcher wishes to generalize the results of the study. Accessible Population. -The smaller portion of the target population to whom the researcher actually has access. Sample.
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The group of people to whom the researcher wishes to generalize the results of the study
-An overrepresentation or underrepresentation of some characteristic in the sample relative to the target population
using other than random procedures.
The probability of any member of the target population being included in the sample can be calculated.
C identify population
C establish sampling frame
C number elements in sampling frame consecutively
C randomly select from list
Determine “effect size of treatment”
Use in power analysis formula
Achieves the least measurement error
The bigger the better
C cost and convenience
C 10% minimum for descriptive studies
C 15 subjects/group for experiments
C 5 for each cell in factorial