Social
Studies 201
September
10, 2003
A. Examples of Sampling Error
1. Probability statement from the polling agency Ipsos-Reid web site: http://www.ipsosreid.com/media/dsp_displaypr_cdn.cfm?id_to_view=1894
According to a new study conducted by Ipsos-Reid on behalf of the
Scotiabank, Canadians with children 18 years of age and younger appear to be
concerned about the costs that will face their children regarding
post-secondary education.
In fact, more than eight in ten
(85%) agree that “increases in tuition and lodging expenses for post-secondary
education are a concern,” with 61% who strongly agree with this statement. As
well, two-thirds (65% - 41% strongly agree) think that “the cost of a college
or university education is putting it out of reach for my children.” Another
six in ten (61% - 37% strongly agree) parents agree with the statement, “I
don’t know how my children will be able to pay off their post-secondary
education debt.”
These are the findings of an Ipsos-Reid poll conducted on behalf of Scotiabank between August 12th and August 21st, 2003. The poll is based on a randomly selected sample of 658 Canadians with children under the age of 18. With a sample of this size, the results are considered accurate to within ± 3.8 percentage points, 19 times out of 20, of what they would have been had the entire adult Canadian population been polled. The margin of error will be larger within regions and for other sub-groupings of the survey population. These data were statistically weighted to ensure the sample's regional and age/sex composition reflects that of the actual Canadian population according to the 2001 Census data.
2. The following table gives the sampling error for the variable sex in the Survey of Student Attitudes and Experiences, Fall 1998. The sample size was n = 712.
Sex of Respondent |
Percentage in Sample |
Percentage in Population |
Sampling Error |
Male |
37.0% |
39.4% |
-2.4% points |
Female |
63.0% |
60.6% |
2.4% points |
B.
Labour Force Survey, August 2003.
Saskatchewan and Canada.
Number of People in Thousands
SASKATCHEWAN CANADA
Population aged 15 or over 755.8 25,285.8
Labour Force 531.8 17,486.0
Employed 499.3 16,048.7
Full-time 413.3 13,443.8
Part-time 86.1 2,604.9
Unemployed 32.5 1,437.3
Not in Labour Force 224.0 7,799.8
Unemployment Rate (%) 6.1 8.2
Participation Rate (%) 70.4 69.1
Employment Rate (%) 66.1 63.5
Calculation of rates for Saskatchewan:
.
Sources: Government of Saskatchewan, Bureau of Statistics, Labour Force Statistics, September 8, 2003, from web site: http://www.gov.sk.ca/bureau.stats/lfs/lfsindx.htm
and from Statistics Canada web site:
http://www.statcan.ca/english/Pgdb/lfsadja.htm September 8, 2003.
Last edited September 12, 2003