ATTACHMENT B

Step 3:
Step 4:
Determine the Nth circuit which should be pulled form each extract file by
dividing the number of circuits per file by the number of circuits to pull:
4 (3 e
Example: File Name Circuits # toPull Every Nth
ATLOOPR1.TXT
I
ATLOOPRZTXT >: . .#
ATLOOPR3.TXT
Run the sample selection program for each CRIS extract file. First run QBASIC
(usually in the DOS subdirectory). Then select File Open and type SAMPLE.BAS.
Then select Run. The program will ask for an input file - type the name of the
CRIS extract file. The program will then ask for an ouput file - give the program
a file name which will represent the total residence sample. The extension should
be "TXT". Finally, the program will ask you to type the number of the Nth circuit
which you would like to include in the sample as well as the random start.
Repeat the process for each CRIS extract file usinf the same ouput file name.
The program will append the contents of the output file each lime the program
run. Thus, the output file will include the sample selections from each CRIS extract.
B. Business Classes of Service:
/ 5 (Small Business,
,4
Unlike the residence CRIS extracts, the business extracts are a mixture of several classes
of service. Therefore, it is necessary to split the extracts into class of service buckets in
order to select circuit IDS for the survey. This is accomplished via data base queries
in PARADOX. Once the circuits have been divided into class of service buckets, the
sample selection process is the same as identified for the residence class of service
Step 1:
Import all of the CRIS business circuit extracts into PARADOX and combine
the tables into a single business circuit table. (Use the Utilities I Add
facility to add records from one table to another.) Due to the size of the
files, this may require a good bit of time. ..
Step 2:
34
Query the business drcuit data (the single large table) to split the extract
into class of service buckets. Query the business circuit data using the following
USOC tables and save the answer table for each query result
CI ass of Service USOC Table Rename Answer Table to:
Small Business BUSU -SB
-
- = first letter of state being studied
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Loop Sample Selection Instructions