we observed that several parts of the sample size calculation process can be guided by a software or calculator and it can prevent incorrect calculation, incorrect use of formula, incorrect parameters, and incomplete sample size reporting.
The calculator consists of an input module, a calculation module and a display module, wherein a calculation formula operated in the calculation module corresponds to a sampling method input in the input module; the calculation module consists of a read only memory (ROM) (5), a random access...
(1) wherez2is the confidence limit of the study (95%),pis the proportion of study population (38.3%),wis margin of error or desired precision (5% or 0.05), andnis total sample size. Let us takep= 38.3% which is prevalence rate for home delivery which is most common traditional malpra...
The sample size for the study was calculated by using StatsDirect statistical software version 2.7.8 at 95% confidence interval based on 13.2% as the highest prevalence of bTB in indigenous cattle in Tanzania [12] with 2% as an acceptable absolute deviation of sample rate from population rate....
the small sample size might have influenced the power required to reveal significant differences. Last, the study had a 50% response rate which, despite being an acceptable rate for online questionnaires, especially in healthcare settings, has missed the responses of half of the target population,...
population proportion formula:n= (1.96)20.383(1 − 0.383)/(0.05)2= 364. With correction formulan/1 +n/N(wherenis the sample size we calculate as 364 andNis total population), our sample size becomes 289 and then, with 10% nonresponse rate, a total of 318 study participants were ...
This quantification was assessed by the online Netquest calculator using Formula (1). For the calculation, a study universe of the members of the Czech Dental Chamber (N = 11,162), a margin of error of 5%, a confidence level of 95%, and a standard heterogeneity of 50% were used. As...