october 2008 getting to know data sources soc 3140 prof. sylvie lafrenière susan mowers, gsg /...
TRANSCRIPT
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October 2008
Getting to Know Data Sources
SOC 3140 Prof. Sylvie Lafrenière
Susan Mowers, GSG / Library
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October 2004 GEG3104
Outline
• Doors to sociology research at the Library– Sociology Librarian, research expertise– GSG Centre, access to Data
• Getting a handle on Statistics Canada surveys
• From Data to Statistics
• Using data tools and documentation
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October 2008
Library:
Doors to Research and Data
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October 2004 GEG3104
Sociology Librarian Research expert
Andrée Côté• Available for appointments
• 613-562-5800 (3656)
• Morisset, first floor
• EXPERTISE! Using the Library collections, databases and services for sociology
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October 2004 GEG3104
Additional Services GSG
• Geographic
Statistical and
Government INFORMATION CENTRE
• GSG helps students to find, access and use:– Data, statistics, geographic and government information, including
• DLI and other data• Technical support for using data• Services on site, lab, statistical and GIS software • Hard-to-find government information
• Contact Susan:Morisset Library, Room 308 in [email protected] by email
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October 2008
More about Data …
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October 2004 GEG3104
DATA DATA DATA!!
VIA Data Liberation Initiative
DLI: partnership between 74 Canadian universities + Statistics Canada.
…students can access all DLI data through GSG (3rd floor Morisset) and Web
- person-level public-use microdata, - statistics at a detailed level of geography, time series data, - and Geographic data
DLI contact: Susan… [email protected]
… Commercial use is strictly prohibited.
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October 2008
Surveys … one example of Survey Data
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October 2004 GEG3104
Survey Question …
STATISTICS CANADA’S NUMÉRO UNO (BIGGEST) SURVEY !
… it’s “so big”, it can only happen every 5 years!
… What is this survey called ?
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October 2004 GEG3104
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October 2004 GEG3104
The 2006 Census of Population
From your mailbox:May 16, 2006
… to statistics in the media
September 13, 2007
Married people now in the minority; For the first time in Canada, most adults are not legally wed, census shows. …more people are choosing common law over marriage.
…Public-use microdata to be released Summer 2009
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October 2004 GEG3104
IT ALL COMES FROM THE QUESTIONS! 2006 Census– SHORT (2A) and LONG (2B) Questionnaires, on, e.g., family relationship …
etc.
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October 2004 GEG3104
Want more information on the Census?
• Survey page on the Census at Statistics Canadahttp://www12.statcan.ca/english/census/index.cfm
• Main CENSUS page at Statistics Canadahttp://www.statcan.ca/cgi-bin/imdb/p2SV.pl?
Function=getSurvey&SDDS=3901&lang=en&db=IMDB&dbg=f&adm=8&dis=2
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October 2008
Getting a Handle on Surveys :
Who’s in the GSS 18 ?
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October 2004 GEG3104
What special groups of interest might there be in the GSS 18 ?
Click on Statistics Canada – Main survey page below:
http://www.statcan.ca/cgi-bin/imdb/p2SV.pl?Function=getSurvey&SDDS=4504&lang=en&db=IMDB&dbg=f&adm=8&dis=2
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October 2004 GEG3104
Possible special population groups
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October 2004 GEG3104
IT ALL COMES FROM THE QUESTIONS!
GSS 18 Questionnaire …http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-questionniare.pdf
for example, Visible Minority Status
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October 2004 GEG3104
IT ALL COMES FROM THE QUESTIONS!
GSS 18 Questionnaire …http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-questionniare.pdf
for example, Discrimination related to Visible Minority Status
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October 2004 GEG3104
IT ALL COMES FROM THE QUESTIONS!
GSS 18 Questionnaire …http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-questionniare.pdf
for example, Discrimination based on Religion
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October 2004 GEG3104
Given the question on Discrimination based on Religion in the GSS 18 (2004)…
FIND OUT: Should you be able to confirm whether discrimination based on religion increased after September 11, 2001?
Click on: http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-
Comparison Victimization cycles.pdf
Go to page 30 (page 394 at bottom of page)
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October 2004 GEG3104
Can you compare religious discrimination before and after 9/11?
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October 2008
Visible minority status / Religion
DO THEY WARRANT STUDY?
SAMPLE SIZES FOR…
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October 2004 GEG3104
GSS 18 Data Dictionary http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Data-dictionary-main.pdf
on visible minority status
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October 2004 GEG3104
GSS 18 Data Dictionary http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Data-dictionary-main.pdf
Discrimination … related to visible minority status …
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October 2004 GEG3104
A significant sample size
…is often considered to be 2,000
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October 2004 GEG3104
GSS 18 Data Dictionary http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Data-dictionary-main.pdf
on religion: e.g., other “including” Muslim …?
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October 2004 GEG3104
GSS 18 Data Dictionary http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Data-dictionary-main.pdf
Discrimination related to Religion
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October 2004 GEG3104
What is this difference between the two columns …?
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October 2008
From WEIGHTS and MEASURES
Author: Wendy Watkins, Carleton University
DLI, Guelph (2000)
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October 2004 GEG3104
Why are Weights Used?
• Data are often collected in a disproportionate manner
– E.g., A greater percentage of the population are interviewed in PEI than Ontario
– Weighting adjusts for this bias
– Each weighted observation represents one observation in the population
– Weighting important for academic research (journal pubn…)Author: W. Watkins, 2000
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October 2004 GEG3104
How does SPSS Apply Weights?
• SPSS has a simple procedure for applying weights• Open our data file:
– Click on:https://login.proxy.bib.uottawa.ca/login?url=http://gsg.uottawa.ca/data-license/gss_general_social_survey/c18-victimisation-
2004/eng/data/gss18pumfm-3142-class-only.sav
• Click on : “Data”– Click on “Weight cases by”
– Choose appropriate weight variable (read documentation)
– Click “OK”
Author: W. Watkins, 2000
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October 2008
SPSS hands-on exercise
Differentiating weighted and unweighted results?
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October 2004 GEG3104
Unweighted results – Let’s weight these…
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October 2004 GEG3104
Again, we look for the weight variable in the Dictionary for our variables, e.g., WGHT-PER for DIS-REL
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October 2004 GEG3104
WE WILL turn on our PERSON WEIGHT variable and then run our tabulations for
VISIBLE MINORITY STATUS
1. Ensure you have opened the GSS18 dataset at: https://login.proxy.bib.uottawa.ca/login?url=http://gsg.uottawa.ca/data-license/gss_general_social_survey/c18-victimisation-2004/eng/data/gss18pumfm-3142-class-only.sav
2. Click on Data and … Weight Cases …
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October 2004 GEG3104
Finish turning weighting on…
3. Click on Person weight and tick circle “Weight cases by”
4. Click on the arrow
5. ..and click on “OK”
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October 2004 GEG3104
Lets tabulate some variables (our results will be weighted) …
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October 2004 GEG3104
Cross tabulating our 4 variables in SPSS
1. Click on Analyse and Descriptive Statistics:
2. Then click on Cross-tabs …
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October 2004 GEG3104
Cross-tabulating cont’d
3. Scroll down until you arrive here (you will start by selecting these three variables)
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October 2004 GEG3104
Cross-tabulating cont’d
4. Click on the variable below and click on arrow for Row(s), we will continue on for the next two variables below..
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October 2004 GEG3104
Cross-tabulating cont’d
5. Select the next variable below as shown, click on the same arrow (Row(s)) and do the same for the next variable below.
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October 2004 GEG3104
Cross-tabulating cont’d
6.Three variables will appear in the Rows box.
7. Click on Visible minority status (just above), then click on the arrow for Column(s)
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October 2004 GEG3104
You are ready to cross-tabulate your weighted results!
8. Click on “OK”
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October 2004 GEG3104
Weighted tabulations !
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October 2008
Basic documentation checklistfor the GSS 18
For your reference…
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October 2004 GEG3104
GSS 18 Documentation Checklist
Statistics Canada – Main survey page on the GSS 18:http://www.statcan.ca/cgi-bin/imdb/p2SV.pl?Function=getSurvey&SDDS=4504&lang=en&db=IMDB&dbg=f&adm=8&dis=2
Complete Users Guide to the GSS 18 survey and data:http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE.pdfincludes questionnaire, data dictionaries, survey, sampling and weighting methodology, comparison of content of cycles 3, 8, 23, and 18 …
Comparison of cycles: http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Comparison Victimization cycles.pdf
Data Dictionary: http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-Data-dictionary-main.pdf
Questionnaire: http://gsg.uottawa.ca/data/teaching/soc/version2-12M0018-GPE-questionniare.pdf
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October 2008
Other surveys
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October 2004 GEG3104
Some Statistics Canada Surveys of Households
• Census every 5 years
• Special Surveys, various health, labour force, longitudinal survey of children and youth…
• Post-censal surveys, every 5 or 10 years : Aboriginal Peoples Survey; Ethnic Diversity Survey;
Participation and Activity Limitations Survey
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October 2004 GEG3104
Health DivisionCanadian Community Health Survey (CCHS)
• Collects information related to health and health determinants for the Canadian population. Over 130,000
responses cycles 1.1, 2.1, 3.1… • Special topics, e.g., 1.2 content, Mental Health and Well-
being
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October 2004 GEG3104
Browse surveys available from STC DLI
• All are DLI surveys comprise cross-sectional survey data
• Browse collection of surveys from DLI -click here
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October 2008
Comparing microdata and statistics
(moving onto research findings and statistics for the GSS 18)
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October 2004 GEG3104
What is the difference ?
Data :
• Digital – computer readable
• Raw data
• Not presentation-ready
• Require processing
Statistics :
• May be computer readable.
• Summaries of data
x number of 95-99 year olds in Saskatchewan in 2001 ?
1,345
• Presentation-ready
• Are often mapped (or graphed) for visual presentation
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October 2004 GEG3104
Statistics come from…
…DATA !
Data are processed to become Statistics Person 1…2 …
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October 2004 GEG3104
000031214110011982001212222221002098200121222222401121111241112121112205020197111971021212222225211026121204300140955720411313022111999901978787879702221411271412400315000616611232222222221111172626162212222666666636212000000020320222224222000022204141101101102111111122111000000210000000002100000000010000000000200000423300200200100000100200
000041100110011101102122222221002009200212222222021111111231212111211208120193811938044122222221111052201203901007504721031191012233520406058787870304221303420708300400001420007111222122211721575656565555555666666656565000555500210222111111110000001111100001101112212122111011010110000110101100000000000000000000000000000000000000000000000000
Person “x”
Person “y”
Statistics (The Daily/Studies) Aggregate data (Statistics)
Raw data (Confidential/Master file)Public-use microdata file (anonymous) Eg, SPSS
Data Liberation Initiative
Research Data Centres
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October 2004 GEG3104
Data versus Statistics
* These images were taken from the following website: http://www.chcc.ac.uk/overview/faq7/q2.html
GEOGRAPHY:
e.g., CMA and Province: PUMF
GEOGRAPHY:
e.g., towns, smaller cities, neighbourhoods: Census profiles
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October 2004 GEG3104
LET’s FIND the GSS 18 in the recent News
1. Click on the main survey page again:http://www.statcan.ca/cgi-bin/imdb/p2SV.pl?Function=getSurvey&SDDS=4504&lang=en&db=IMDB&dbg=f&adm=8&dis=2
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October 2004 GEG3104
Click on The Daily
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October 2004 GEG3104
And click on one of the headlines
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October 2004 GEG3104
Scroll down The Daily article, from descriptive commentary to a table
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October 2004 GEG3104
Go back (left arrow twice..) to main survey page and browse both Publications and Analytical studies
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October 2004 GEG3104
Through Analytical studies, try to find…
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October 2004 GEG3104
Review academic and related literature
• Contact– Andrée Côté, Social Sciences Librarian
• 613-562-5800 (3656)
• Morisset, first floor
![Page 63: October 2008 Getting to Know Data Sources SOC 3140 Prof. Sylvie Lafrenière Susan Mowers, GSG / Library](https://reader035.vdocuments.net/reader035/viewer/2022062720/56649efc5503460f94c0f344/html5/thumbnails/63.jpg)
October 2004 GEG3104
Thank you!
Susan
Geographic, Statistical and Government Information Centre
Third floor, Morisset