Factors Affecting Sample Size Determination. Sample size is inter-connected with statistical analysis of the data and generalisation. The variance of the population the greater the variance the larger the sample size The effect size the smaller the effect size the larger the required sample The control group outcome rate.
The lower the significance level the lower the power of the test. Margin of Error. Whether you are using a probability sampling or non-probability sampling technique to help you create your sample you will need to decide how large your sample should be ie your sample size.
Factors affecting sample size determination One of the important factor while determining the size of the sample is the number of centerswhich means on the assumption that they are dealing with one set of the respondents.
It indicate the factors that affect the sample size determination procedure and explains how. The lower the significance level the lower the power of the test. May 10 2002 There are three main factors that must be considered in the calculation of an appropriate sample size as summarized in Table 1. A over-sized samples and b under-sized samples.
