CALCULATION OF SAMPLE SIZE-FORMULA 1

SAMPLE SIZE CALCULATION

FORMULAR 1:  Calculation of sample size in medical research is one of the most important steps towards data collection and a well predetermined sample size will generate sufficient data required.  In a series of discussion, we will be looking at the most common formulae used in calculation of sample size.

Where,

1. n is the required sample size,

2. Z is a tabulated value in relation to the significance level of the study that is to say, 1.96 for α=0.05

3. d is the standard deviation of the variable in the study basing on previous studies.

4. p is the proportion of the population to be estimated

5. And e is the tolerance measurement error.

 

RELATED;

1.  STRATEGIES FOR DETERMINING SAMPLE SIZE

2.  SAMPLING

3.  SAMPLE SIZE CALCULATION FORMULA 3

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