A Brief Introduction to Biostatistics

(C. Jardin) #1

Sampling error



  • Could the difference of 0.23 kg =(3.5kg-3.27kg) be
    real or could it be due purely to chance in sampling?

  • ‘Apparent’ different betw population mean and the
    random sample mean that is due purely to chance in
    sampling is called sampling error

  • Sampling error does not mean that a mistake has
    been made in the process of sampling but variation
    experienced due to the process of sampling

    • Sampling error reflects the difference betw the value
      derived from the sample and the true population value



  • The only way to eliminate sampling error is to
    enumerate the entire population

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