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Data Analysis with IBM SPSS Statistics

You're reading from   Data Analysis with IBM SPSS Statistics Implementing data modeling, descriptive statistics and ANOVA

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787283817
Length 446 pages
Edition 1st Edition
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Authors (2):
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Ken Stehlik-Barry Ken Stehlik-Barry
Author Profile Icon Ken Stehlik-Barry
Ken Stehlik-Barry
Anthony Babinec Anthony Babinec
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Anthony Babinec
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Toc

Table of Contents (17) Chapters Close

Preface 1. Installing and Configuring SPSS FREE CHAPTER 2. Accessing and Organizing Data 3. Statistics for Individual Data Elements 4. Dealing with Missing Data and Outliers 5. Visually Exploring the Data 6. Sampling, Subsetting, and Weighting 7. Creating New Data Elements 8. Adding and Matching Files 9. Aggregating and Restructuring Data 10. Crosstabulation Patterns for Categorical Data 11. Comparing Means and ANOVA 12. Correlations 13. Linear Regression 14. Principal Components and Factor Analysis 15. Clustering 16. Discriminant Analysis

Scoring new observations

After you have developed and evaluated a model based on historical data, you can apply the model to new data in order to make predictions. In predictive analytics, this is called scoring. You score cases for which the outcome is not yet known. Your evaluation of the historical data gives you a sense of how the model is likely to perform in the new situation.

One way to implement scoring is to make use of the classification function coefficients. Here is the syntax in which the classification function coefficients are used in compute:

compute cf1=57.351*alcohol+.854*malic_acid+39.031*ash
-.662*ash_alcalinity+.502*magnesium-3.261*total_phenols
+3.579*flavanoids+39.626*nonflavanoid_phenols+1.243*proanthocyanins
-3.988*color_intensity+27.600*hue+22.527*dilution
+.021*proline-523.443.
compute cf2=52.373*alcohol+.134*malic_acid+28.029*ash
+.465*ash_alcalinity...
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