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Food Safety Management Platform
Sample size calculator
Number of employees:
ⓘ
When undertaking a food safety culture survey, the population size is the number of company employees.
Confidence Level (%):
ⓘ
The probability that the calculated sample size of completed questionnaires accurately reflects the opinions of all company employees had they completed the food safety culture survey. The industry standard is to set the confidence level at 95%.
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95
99
Margin of Error (%):
ⓘ
This is the statistically calculated degree of error (tolerance) in survey results. The industry standard is to set the Margin of error at 5%.
An example of the margin of error can be seen Where a company has undertaken a food safety culture survey and calculated a culture maturity score of 3.9, then with a 5% Margin of error the accuracy of the score statistically is between 4.095 and 3.705. By reducing the Margin of error to 1% the accuracy of the score statistically reduces to 3.938 and 3.861.
By reducing the margin of error, we can increase the accuracy of the survey results, but a reduced margin of error will require a larger number of questionnaires to be completed for the represented population size.
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