IBM SPSS COMPLEX SAMPLES 19 manual 265

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Sample Files

„stroke_clean.sav. This hypothetical data file contains the state of a medical database after it has been cleaned using procedures in the Data Preparation option.

„stroke_invalid.sav. This hypothetical data file contains the initial state of a medical database and contains several data entry errors.

„stroke_survival. This hypothetical data file concerns survival times for patients exiting a rehabilitation program post-ischemic stroke face a number of challenges. Post-stroke, the occurrence of myocardial infarction, ischemic stroke, or hemorrhagic stroke is noted and the time of the event recorded. The sample is left-truncated because it only includes patients who survived through the end of the rehabilitation program administered post-stroke.

„stroke_valid.sav. This hypothetical data file contains the state of a medical database after the values have been checked using the Validate Data procedure. It still contains potentially anomalous cases.

„survey_sample.sav. This data file contains survey data, including demographic data and various attitude measures. It is based on a subset of variables from the 1998 NORC General Social Survey, although some data values have been modified and additional fictitious variables have been added for demonstration purposes.

„telco.sav. This is a hypothetical data file that concerns a telecommunications company’s efforts to reduce churn in their customer base. Each case corresponds to a separate customer and records various demographic and service usage information.

„telco_extra.sav. This data file is similar to the telco.sav data file, but the “tenure” and

log-transformed customer spending variables have been removed and replaced by standardized log-transformed customer spending variables.

„telco_missing.sav. This data file is a subset of the telco.sav data file, but some of the demographic data values have been replaced with missing values.

„testmarket.sav. This hypothetical data file concerns a fast food chain’s plans to add a new item to its menu. There are three possible campaigns for promoting the new product, so the new item is introduced at locations in several randomly selected markets. A different promotion is used at each location, and the weekly sales of the new item are recorded for the first four weeks. Each case corresponds to a separate location-week.

„testmarket_1month.sav. This hypothetical data file is the testmarket.sav data file with the weekly sales “rolled-up” so that each case corresponds to a separate location. Some of the variables that changed weekly disappear as a result, and the sales recorded is now the sum of the sales during the four weeks of the study.

„tree_car.sav. This is a hypothetical data file containing demographic and vehicle purchase price data.

„tree_credit.sav. This is a hypothetical data file containing demographic and bank loan history data.

„tree_missing_data.sav This is a hypothetical data file containing demographic and bank loan history data with a large number of missing values.

„tree_score_car.sav. This is a hypothetical data file containing demographic and vehicle purchase price data.

„tree_textdata.sav. A simple data file with only two variables intended primarily to show the default state of variables prior to assignment of measurement level and value labels.