SAMPLING FROM DIRECTORIES, PHONE BOOKS, ETC
SAMPLING FROM DIRECTORIES, PHONE BOOKS, ETC. - Answers
(Example from p. 223 of an old UC Academic Directory)
Possible sampling strategies
Random numbers between 1 and 5000.
-not practical to identify each person by number
Sample entire pages
-big cluster effect
Sample pages, then columns within selected pages, then take all in a column
-still a big cluster effect
General strategy to use
3 random numbers per selection:
-page number (1-400?)
-column number (1-3)
-line number (1-82) or person number (1-?)
-not clear what the maximum number of persons is
-there will be some blanks in either case
Examples: What person do we select with the following selections?
-pick column 2, line 6
Fritz, Jo Ann -- 1 line entry
-pick column 2, line 8
2nd line of entry for Fritz, Kathleen
need a rule: only 1st counts, otherwise blank
-pick column 3, name 3
Fruscione, Antonella
-pick column 3, name 35
-only 32 names in this column -- a blank
-need to set max names big
-can't avoid blanks
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