Material for lectures in course 610
regarding lecture on sampling Please read and reply to me as soon as possible
Slides for lecture
(Possible) practical assignment on sampling
Recording sheets: page 1 page 2 page 3
Sampling Frame for questions on the exam
Moore & McCabe 3rd Edition
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:
Burn Injuries in New England "What If "-1 "What If "-2
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
Sample Size and Sex
A Big State needs a Big Sample
Standard Error for a Weighted Average of Stratum-specific Estimates
How long are words?
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.