Consumer Research > Categorical Response Analysis > Statistical Details for the Categorical Platform > Rate Confidence Intervals
Publication date: 07/15/2025

Rate Confidence Intervals

The confidence interval for a rate, λ, is defined as follows:

Equation shown here

where y0 is the frequency, n is the total cases, and Χ2 is the standard chi-squared critical value. Note that when y0 = 0, the lower limit is set to 0.

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