In this article, we will learn with examples, the right way to calculate and determine the sample size of a study using Taro Yamane’s formula in research. We will use an illustration of real-time research carried out in recent times.

We will start by showing you sample of how to present population of the study. You will also learn how to organize your estimated population in tables and categorizing the data.

Stage by stage process of calculating and determining what the sample size is using Taro Yamane will show as well. If you have any question or need help determining your sample size, do not hesitate to reach out to us immediately.

See Illustration Below

Population of the Study

The population of the study are the network and technical department, metering and revenue department, and the supervisors and management staff of the Enugu Electricity Distribution Company (EEDC). During field survey (2026), EEDC staff at Enugu North Local Government Area are estimated in table 3.1 below:

Table Showing the Categories and Population of Study                             

Sampling Technique and Sample Size

Stratified random sampling technique was used to determine the sample population; the sample size was determined by adopting Taro Yamane model.

Sample Size:

nh =   n x Nh   

              N

Where:

N = Total population

  n = Sample size

  Nh = Population of each zone

  nh = Sample size per zone

Ogui District:

154 x 85    = 52.36 say 52

     250

GRA Feeder Zone:

154 x 61    = 37.58 say 38

     250

New Haven (North) Feeder Zone:

154 x 60    = 36.96 say 37

     250

Independence Layout (North) Feeder:

154 x 44    = 27.104 say 27

     250

So, the above is how to determine the sample size of a study using Taro Yamane’s formula in research.

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