Business analysis using regression: a casebook - download pdf or read online

By Dean P. Foster;Robert A. Stine;Richard P. Waterman

ISBN-10: 0387983562

ISBN-13: 9780387983561

ISBN-10: 1461206839

ISBN-13: 9781461206835

Preface statistics is seldom the main eagerly expected process a company scholar. It mostly has the recognition ofbeing aboring, complex, and complicated mixture of mathematical formulation and pcs. Our target in penning this casebook and the significant other quantity (Basic company facts) was once to alter that impact by means of exhibiting how records supplies insights and solutions attention-grabbing enterprise questions. instead of live on underlying formulation, we exhibit how one can use facts to respond to questions. each one case examine starts off with a enterprise query and concludes with a solution. formulation look purely as had to deal with the questions, and we specialize in the insights into the matter supplied via the math. the maths serves a objective. the cloth is prepared into 12 "classes" of similar case reviews that increase a unmarried, key concept of records. The research of knowledge utilizing facts is seldom very ordinary, and every research has many nuances. half ofthe allure ofstatistics is that this richness, this mixing of major theories and arithmetic. For a newcomer, although, this mixture is just too wealthy and they're simply crushed and not able to tackle the $64000 rules from nuances. even though later instances in those notes recommend this complexity, we don't commence that means. every one type has one major suggestion, anything giant like commonplace mistakes. we start a category via discussing an software selected to inspire this key inspiration, and introduce the mandatory terminology.

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Example text

Does predicting the number at the end of next year seem reasonable? What about extrapolating five years out? For problems such as these, it is important to have a notion ofthe accuracy ofthe prediction. We return to this example in Class 2 and do that. 36 Class I Fitting Equations to Data An Alternative Analysis When modeling time series with strong growth such as this one, we might proceed as in our analysis of stock prices in Class 2 of Basis Business Statistics. Rather than model the raw data, the idea is to model the rate of growth.

It does not grow exactly along a straight line, though. Too many factors influence what's bought and sold, and our models are unlikely to include all ofthe relevant factors. For example, suppose Alan Greenspan mumbles something about interest rates on a Monday moming. Though most likely not apart of our predictive model, his thoughts are going to affect the market on Monday aftemoon, deviating from our predicted trend. On Tuesday, the influence of Greenspan's remarks will not have disappeared, although they might not be quite so Class 2 Assumptions in Regression Modeling 43 influential.

2 million. 6 million. What assumptions are implicit in these predictions? Does predicting the number at the end of next year seem reasonable? What about extrapolating five years out? For problems such as these, it is important to have a notion ofthe accuracy ofthe prediction. We return to this example in Class 2 and do that. 36 Class I Fitting Equations to Data An Alternative Analysis When modeling time series with strong growth such as this one, we might proceed as in our analysis of stock prices in Class 2 of Basis Business Statistics.

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Business analysis using regression: a casebook by Dean P. Foster;Robert A. Stine;Richard P. Waterman


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