Statistical Calculators

PRC provides two statistical calculators for your convenience:

Error Rate Calculator (all error rates calculated at 95% level of confidence)

Error Rate Defined: Error rate is the expected error associated with a sampling technique, based on sample size and response rate. Please examine the text below the calculator for usage instructions.

Statistical Significance

Statistical Significance Defined: Statistical significance is said to exist when a difference between samples/responses is large enough so as to be attributed to something other than expected sampling error.