Sample size determination and sampling procedure A single population mean formula33 was used to calculate the sample size by taking the SD of the population (±0.39) after undertaking a pilot study on 30 patients with cancer at TASH due to a lack of similar studies in Ethiopia, a confidence level of 95%, and the maximum acceptable difference of 5% n= where n=Minimum sample size of the study subject, z=Standard normal distribution curve /value for the 95% CI (1.96), σ = SD deviation of the...
