QUANTITATIVE METHODS

Quantitative Methods and Analysis-Unit3DB-Sampling

Quantitative Methods and Analysis-Unit3DB-Sampling

Determination of Sample Size

The choice of an appropriate sample size is a common question when designing a statistical study should be how many objects in the sample? If the sample is too large, it wastes money by getting the data (Mann, 1995). If the sample is too small, the conclusions drawn will be unsafe. The required sample size depends on three factors:

The desired confidence level of confidence levels most commonly used are 95% and 99%, but can use any level between 0 and 100%. The 95% value corresponds to z = 1.96 and 99% to the ...