Customer Satisfaction Tracking Calculator
Confidence Intervals are the + / - figures, usually reported in opinion polls, as a means of understanding the accuracy of a survey's results.
From the diagram below, it would be easy to assume that Store 1 is performing better than Store 2 for cleanliness. However, after calculating the margin of error for Store 1 as + / -21% (based on a population of 500 within the retailer's footprint and a sample of 20 customers) and the margin of error for Store 2 as + / -4% (based on a population of 100 within the retailer's footprint and a sample of 86 customers), we have more confidence in the accuracy of the figures for Store 2.
Use the free tool shown here to calculate the margin of error for your survey results. It's designed as a quick check for you to be confident that the responses you obtain represent your footprint.
