**Simple Interactive Statistical Analysis**

The purpose of the SMR procedure is to estimate the confidence interval for a rate ratio. In practice, this will often be the Standardized Mortality Ratio, the Standardized Morbidity Ratio (SMR) or the Comparative Mortality Figure (CMF). The rate ratio is most suited to study events in a constant domain while the denominator -i.e. the population at risk- is very large. Including errors in estimate, exact and fieller analysis.

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