Sampling according to Slovin's formula if the population size is large
Sampling according to Slovin's formula if the population size is large
When selecting a sample
when the population size is large. For example country population, state
population, or village population. Such a large population cannot be included
directly in the research. So a group representing this population is called a
sample. We intend to include this sample in research, but we face many
difficulties in selecting a sample from a large population. Primarily some
people visit 5%, 10% of the sample
population. Or they determine the sample size from the population as a percentage.
But even if this method is used, it is necessary to select the sample in a
scientific manner. For this, we need to select the sample using some statistical
techniques. If we select a sample based on these statistical techniques, the
sample is considered to be representative of the population. For this, we will
see how to use Slovin's formula
Example -
18000 farmers
are members of Sahyadri Agro Farm. How many farmers will be included in the
sample? Based on Slovin's formula method, the sample selection is done as
follows.
Slovin's formula - n = N / (1+Ne2)
n: sample size required N: population size e: Acceptable margin of
error (0.05) |
n = N / (1+Ne2) n = 18000
/ (1+18000(0.05)2) n = 18000
/ (18001(0.0025) n = 18000
/ 45.0025 n = 399.98 n = 400 |
From this out of 18000 farmers in Sahyadri Agro Farm 400 farmers will be selected as samples.
Comments
Post a Comment