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Sample size determination

Sample size determination is an important step in conducting research since it should provide the necessary information about the population of the study. In case the sample size is smaller than expected, the obtained results of the study cannot be generalized to the target population. On the other hand, the larger the sample size the more precise the findings. However, it is not usually possible to have a large sample size due to research limitations, such as cost, time, or the convenience of collecting the data. There are different approaches to calculate the sample size:

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