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an approach to sampling that has the characteristics of being randomly selected and the use of probability theory to evaluate sample results. Whereas non-statistical sampling is therefore any sampling approach that does not have both of the characteristicss of statistical sampling. I hope this will help....
Explain the difference between capability and control.
look for a paper being published in "The Oncologist" later this year (2008)
Statistical: must have random sampling, allows you to generalize to the population from which you randomly selected. Practical: do the results hold for similar individuals? allows you to generalize to similar individuals
statistics means numerical facts systematically collected and statistic means, scientific matter or technique of statistical analysis.