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Index of the Sources of Non-Sampling Error

Index by Topic

All the sources of error discussed are listed below in alphabetical order within each of the topics. Click on the source of error you are interested in to link to the discussion on the source of non-sampling error, learn why it is a problem, what its impact is, what Statistics New Zealand currently does to minimise and control the source of error and what we will be doing in the future.

Business Frame

Data collected using external sources 
Delays in birthing businesses 
Delays in ceasing businesses 
Frames created using other sources 
Inaccurate classification 
Inappropriate link of collection unit to statistical unit 
Industries not actively updated 
Outdated information

Data adjustment

Adjustment due to incorrect time period 
GST adjustments 
Seasonal adjustment

Interviewing

Interviewing error 

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Misinterpretation

Format and readability of publications  
Users not aware of limitations of results 
Users not provided with sufficient explanations 
Users provided with misleading graphs

Non-response

Complete non-response 
Imputation Methodology 
Non-responding births 
Partial non-response

Processing

Apportionment of data 
Data entry 
Electronic data capture 
Business classification

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Questionnaire design

Concepts in questionnaire inadequately defined  
Dress rehearsal (test) conditions different from reality 
Incorporation of new technologies 
Information not readily available 
Language used 
Questionnaire not aligned with issues in the economy 
Questionnaire testing 
Questionnaire updating in each new survey period 
Unable to individually tailor questionnaires

Respondents

Inconsistent answers given over time 
Information required not available to business 
Mechanical errors made by respondents 
Respondent load 
Respondent interruption 
Respondent misreporting 
Respondent misunderstanding  

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