STATISTICS CANADA SURVEY LIFECYCLE WOLFVILLE, APRIL 2008 SURVEY LIFECYCLE Michel B. Séguin Atlantic...

STATISTICS CANADASTATISTICS CANADA SURVEY LIFECYCLESURVEY LIFECYCLE WOLFVILLE, APRIL 2008 WOLFVILLE, APRIL 2008

SURVEY LIFECYCLE

SURVEY LIFECYCLE

Michel B. SéguinAtlantic DLI Training


What the heck is a survey?


WHAT IS A SURVEY?

The collection of information from People Businesses Organizations Farms


CENSUS SAMPLE

TYPES OF SURVEYS

Includes all units of the population

Includes some units of the population

Regular surveys Supplementary surveys Post-censal surveys Longitudinal surveys

PROXY OR NON-PROXY


MAJOR COMPONENTSOF A SURVEY

WHO HOWWHAT WHAT ARE YOU DOING TO IT

WHAT’S THE NEWS


WHO

What is the universe Is it a census or a sample Sample

Based on the geography Based on the age Based on presence of children in household Is the sample representative or not of the universe Sample size will be defined according to geography

of dissemination Is the sample based on population, households

families, farms


WHAT Questionnaire design Concepts and definitions Words of questions Closed questions – open-ended questions

- Coding of open-ended questions- Single and multiple responses

Measured or self-reported Flows and skip patterns – questionnaire layout Instructions for Interviewers Computer Assisted Applications Testing of questions (may take 2-3 cycles to test a question)


COMPONENTS OF A SURVEY


HOW

In person – Computer assisted personal interviews (CAPI)

By telephone – Computer assisted telephone interviews (CATI)

Mail out – Mail back Internet Visit to clinic

TRAINING OF INTERVIEWERS


HOW

Respondent relations Purpose of survey Confidentiality assurances Volunteer / mandatory aspects of survey Projects of linking data Projects of sharing of data


WHAT ARE YOU DOING TO IT

Processing the data Editing errors

– Interviewers errors– Capture errors– Respondent errors

Inter-question relationships Path and flows Coding of write-in responses Imputations for non-response or response error Creation of variables and derived variables


PROCESSING THE DATA

Imputation of Data from Other Records on File


PROCESSING THE DATA

The end product of processing = master file!


PROCESSING THE DATA

Weights are added to the Master file


WHAT’S THE NEWS

WE are now in the DISSEMINATION mode Articles in the Daily and Summary Tables Tables in CANSIM PUBLIC USE MICRODATA FILES


WHAT’S THE NEWS PUBLIC USE MICRODATA FILES

Subset of the Master file Variables and derived variables No personal identifiers Extremes that could lead to identify someone are

removed Geographies are regrouped as required

• Some provinces, some CMAs, Urban/Rural Multiple revisions following visits to the Microdata

Release Committee


WHAT’S THE NEWS PUBLIC USE MICRODATA FILES

Data file Documentation

• Users guide• Code book• Record layout• Questionnaire• Variables and derived variables index• Variance tables• SPSS format file• SAS format file

This is ideal… you don’t always get all these files….


NOW THAT YOU HAVE THE DATAHAVE FUN…

STATISTICS CANADA SURVEY LIFECYCLE WOLFVILLE, APRIL 2008 SURVEY LIFECYCLE Michel B. Séguin Atlantic...

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