IUI requires ovulation, at least one open fallopian tube, and a semen sample with healthy sperm. Each IUI treatment is referred to as a cycle â the time from the first day of your period to ovulation and insemination and then a pregnancy test two weeks later.
Total survey error - Sources of nonsampling error. 1  The survey literature decomposes nonsampling errors into five general sources or types: specification error, frame error, nonresponse error, measurement error, and processing error. Specification error occurs when the concept implied by the survey question differs from the concept meant to be measured in the survey.
Non-sampling errors can be further divided into coverage errors, measurement errors (respondent, interviewer, questionnaire, collection methodâ¦), non-response errors and processing errors.