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A fishbowl draw (or a similar method of physically randomizing the selection of numbers from the population contained in the table, such as dropping a coin from high above an enlarged version of the table and allowing it to bounce onto selected numbers) would be preferred for this study. This means of selection would fully randomize the selection, ensuring the validity of the sample, while at the same time would be fairly easy to accomplish. The creation or utilization of a computer program to randomly select numbers form this population would also be a highly valid and reliable way of accomplishing the necessary sampling, but this would be much more time-intensive as it would require the inputting of the entire population into the computer before the sample could be created. Analysis would be...
The population could be stratified based on factors such as the starting digit or whether the number is odd or even, for example, but such divisions would be meaningless and would not require separate evaluation (assuming the sample population was created at random, of course). Simple sampling is not only easier but is more appropriate in this case.
First, can the research be performed safely on the subject? In some cases, the answer to this question may be no, but the research still be justified, if the possible benefits of the research outweigh the risks to the subjects. In this study, there is no safety danger to the subjects. Second, the researcher must attain informed consent from the research participants. It will be easy to obtain this
Using a random sampling helps to insure that there will be a randomly equal number of learning disabled students, gifted students, underachievers and overachievers in each group. In addition the random sampling will help insure a statistically close to equal sampling of males and females in each group. Assumptions will also be made that the students will put forth their best effort in the class work and instruction so that the
This means that smaller segments will require lower numbers of respondents. As a result, 20 people were selected based on the small group of executives that can discuss the cultural challenges of working overseas. (Thomas, 2006, pp. 9 -- 14) Describes the Eligibility Criteria for Study Participants The eligibility requirements are all respondents must have worked in an overseas location for at least nine months. This was selected based on the
Another instance in which random sampling is not important is when a researcher is conducting a qualitative study. In qualitative studies, depth of information from selected units of analysis is given more importance rather than the number and representativeness of the target group or population. Thus, for a researcher conducting in-depth interviews of household mothers (for example), the characteristics/selection criteria set in identifying the target group (household mothers) are more
Eveland's research design is quasi-experimental. The sample populations for the experiment are not randomly selected. There is structure to the experiment with more than one form of measurement during the research process. Quasi-experimental design includes multiple groups and multiple waves of measurement. While there were not a significant number of groups in the experiment, there was more than one. At more than one point in the experiment, measurements were
Role of Research in Social Work Research assists in placing social work in its changing political and social context. This implies the ability to define social work's current environment in terms of dynamics like society and politics. Research assists in establishing a knowledge base and professional status of social work, for example it assisted in establishing evidence-based practice. Research also assists in analyzing population-based research that identifies people at risk