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Datum: What Does the 95% Confidence Interval Statistic in Datum Base Mean?

Answer
  • The confidence interval is the range in which you expect the actual population mean to fall regardless of how many times the test is repeated.
  • The narrower the confidence interval, the more certain the collected data sufficiently represents the device performance
  • For example, consider a test population with mean = 100, 95% confidence interval = 20. There is a 95% chance the population mean falls between 80 and 120 for any similar test on the device.
  • Spirent recommends collecting enough samples so confidence interval falls within 10% of the mean.

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