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Appendix A
and sample weights. The additional variable Current value was collected and added to the
data file after the sample was t aken.
recidivism.sav. This is a hypothetical data file that concerns a government law enforcement
agency’s efforts to understand recidivism rates in their area of jurisdiction. Each case
corresponds to a previous offender and records their demographic information, some details
of their first crime, and then the time until their second arrest, if it occurred within two years
of the first arrest.
recidivism_cs_sample.sav. This is a hypothetical data file that concerns a government law
enforcement agency’s efforts to understand recidivism rates in their area of jurisdiction. Each
case corresponds to a previous offender, released from their first arrest during the month of
June, 2003, and records their demographic in formation, some details of their first crime, and
the data o f their second arrest, if it occurred by the end of June, 2006. Offenders were selected
from sampled departments according to the sampling plan specified in recidivism_cs.csplan;
because it makes use of a probability-proportional-to-size (PPS) method, there is also a file
containing the joint selection probabilities (recidivism_cs_jointprob.sav).
rfm_transactions.sav. A hypothetical data file containing purchase transaction data, including
date of purchase, item(s) purchased, and monetary amount of each transaction.
salesperformance.sav. This is a hypothetical data file that concerns the evaluation of two
new sales training courses. Sixty employees, divided into three groups, all receive standard
training. In addition, group 2 gets technical training; group 3, a hands-on tutorial. Each
employee was tested at the end of the training course and their score recorded. Each case in
the data file represents a separate trainee and records the group to which they were assigned
and the score they received on the exam.
satisf.sav. This is a hypothetical data file that concerns a satisfaction survey conducted by
a retail company at 4 store locations. 582 customers were surveyed in all, and each case
represents the responses from a single customer.
screws.sav. This data file contains information on the characteristics of screws, bolts, nuts,
and tacks (Hartigan, 1975).
shampoo_ph.sav. This is a hypothetical data file that co ncerns the quality control at a factory
for hair products. At regular time intervals, six separate output batches are measured and their
pH recorded. The target range is 4.5–5.5.
ships.sav. A dataset presented and analyzed elsewhere (McCullagh et al., 1989) that concerns
damage to cargo ships caused by waves. The incident counts can be modeled as occurring at
a Poisson rate given the ship type, construction period, and service period. The aggregate
months of service for each cell of the table formed by the cross-classification of factors
provides values for the exposure to risk.
site.sav. This is a hypothetical data file that concerns a company’s efforts to choose new
sites for their expanding business. They have hired two consultants to separately evaluate
the sites, who, in addition to an extended report, summarized each site as a “good,” “fair,”
or “poor” prospect.
smokers.sav. This data file is abstracted from the 1998 National Household
Survey of Drug Abuse and is a probability sample of American households.
(http://dx.doi.org/10.3886/ICPSR02934)Thus,thefirststepinananalysisofthisdatafile
should be to weight the data to reflect population trends.