Selection Bias |
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| Sampling Biases; Sampling Error; Selection Biases; Bias, Sampling; Biases, Sampling; Biases, Selection; Error, Sampling; Errors, Sampling; Sampling Errors | |
| The introduction of error due to systematic differences in the characteristics between those selected and those not selected for a given study. In sampling bias, error is the result of failure to ensure that all members of the reference population have a known chance of selection in the sample. | |