What Is The Minimum Sample Size For Research. If we are using three independent variables then a clear rule would be to have a minimum sample size of 30. Coefficient with the minimum absolute magnitude the minimum sample size required would be 160 based on the inver se square root.
Amend the alpha level for the sample size calculation would be appropriate. Aug 21 2018 Our general recommendation for in-depth interviews is to have a sample size of 20-30 if were building similar segments within the population. Which would be rounded up to 97 because the obtained value is the minimum sample size and sample.
Amend the alpha level for the sample size calculation would be appropriate.
For example if we are interested in estimating the amount by which a drug lowers a subjects blood pressure with a 95 confidence interval that is six units wide and we know that the standard deviation of blood pressure in the population is 15 then the required sample size is. The minimum sample size for using SPSS is 30 according to Sekaran book. For most purposes though the 1 N approach is sufficient. If we are using three independent variables then a clear rule would be to have a minimum sample size of 30.
