Material for lectures in course 610
Important Note
regarding lecture on sampling Please read and reply to me as soon
as possible
(Possible) practical assignment on sampling
Sampling Frame
Recording sheets: page 1 page
2 page 3
Sampling Frame for questions on the exam
Moore & McCabe 3rd Edition
questions
3.33, 3.34, 3.35, 3.36, 3.39, 3.41, 3.43, 3.44, 3.45, 3.46, 3.47, 3.48, 3.49, 3.50
3.57, 3.72, 3.74, 3.79
Material added: november 14, 1999
Examples of Stratified Samples:
HIV Seroprevalence in Massachusetts
Physician Visits and Psychiatric Consultations in Quebec
Examples of Multi-Stage Samples:
Gallup Polls on Smoking Graph showing Yearly Trends
Rubella Immunity - QuebecAdolescents Cluster Samples within Strata
Variance for Estimates from Cluster Samples: "Effective sample size":
Household Survey Example from Cochran's text
Examples of "Custom Design" Samples:
Further Comments on Measurement and Sampling:
"Bigger sample sizes won't fix these problems ..."
Bias and Variability ... being approximately correct and precisely wrong!
If Prob(selection) is proportional to quantity being measured -- Length-biased sampling
How come Gallup uses the same n=1000 in the U.S. and Canada?
Performance of Gallup Poll in U.S. Presidential Elections 1952-1988
A Big State needs a Big Sample
Standard Error for a Weighted Average of Stratum-specific Estimates
Using Random Number Table (from Armitage&Berry) See also M&M sections 3.2&3.3
Systematic Sampling: cf M&M Q 3.41 p264-265 Note on this technique (FDK Liddell)
Limits of memory in Surveys: cf reference to Bradburn in Note 6 p 285 in M&M.