Bivariate and multivariate linear regression models.

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Develop, evaluate, and apply bivariate and multivariate linear regression models.

 

Resources: Microsoft Excel®, DAT565_v3_Wk5_Data_File

 

Instructions:

The Excel file for this assignment contains a database with information about the tax assessment value assigned to medical office buildings in a city. The following is a list of the variables in the database:

FloorArea: square feet of floor space
Offices: number of offices in the building
Entrances: number of customer entrances
Age: age of the building (years)
AssessedValue: tax assessment value (thousands of dollars)

Use the data to construct a model that predicts the tax assessment value assigned to medical office buildings with specific characteristics.

 

Construct a scatter plot in Excel with FloorArea as the independent variable and AssessmentValue as the dependent variable. Insert the bivariate linear regression equation and r^2 in your graph. Do you observe a linear relationship between the 2 variables?
Use Excel’s Analysis ToolPak to conduct a regression analysis of FloorArea and AssessmentValue. Is FloorArea a significant predictor of AssessmentValue?
Construct a scatter plot in Excel with Age as the independent variable and AssessmentValue as the dependent variable. Insert the bivariate linear regression equation and r^2 in your graph. Do you observe a linear relationship between the 2 variables?
Use Excel’s Analysis ToolPak to conduct a regression analysis of Age and Assessment Value. Is Age a significant predictor of AssessmentValue?

Construct a multiple regression model.

Use Excel’s Analysis ToolPak to conduct a regression analysis with AssessmentValue as the dependent variable and FloorArea, Offices, Entrances, and Age as independent variables. What is the overall fit r^2? What is the adjusted r^2?
Which predictors are considered significant if we work with α=0.05? Which predictors can be eliminated?
What is the final model if we only use FloorArea and Offices as predictors?
Suppose our final model is:
AssessedValue = 115.9 + 0.26 x FloorArea + 78.34 x Offices
What wouldbe the assessed value of a medical office building with a floor area of 3500 sq. ft., 2 offices, that was built 15 years ago? Is this assessed value consistent with what appears in the database?

 

 

 

 

Sample Solution

 

What is Anhedonia?

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free definition article sampleThough despondency is an extreme mental ailment, rather regularly individuals utilize the expression “melancholy” to portray a furious state of mind. They additionally will in general comprehend melancholy as the absence of positive feelings, or a powerlessness to feel euphoric. In any case, by doing this, they substitute discouragement for one of its side effects, which is called anhedonia.

The expression “anhedonia” originates from the Greek words a-(which signifies “not,” “without”), and hedone (“joy”). Thus, the most broad definition dependent on historical background would let us characterize anhedonia as the nonattendance of delight. Be that as it may, this marvel is progressively muddled.

As indicated by the Merriam-Webster Online word reference, anhedonia is an individual’s failure to feel joy from exercises that normally delivers it. It doesn’t mean an individual, for instance, delighted in playing football, and afterward lost enthusiasm for this action and changed to something different. An individual with anhedonia actually can’t feel joy or happiness from what they like to do. In its turn, this may prompt increasingly genuine outcomes, since anhedonia breaks the improvements reward system.

Maybe a progressively exact definition would bring up that anhedonia doesn’t let an individual vibe delight from ordinarily agreeable exercises. This implies an individual doesn’t feel energetic about a particular leisure activity, yet about everything that is generally viewed as pleasant: sex, music, humor, social correspondence and collaboration, etc. For instance, a mother with anhedonia could feel that playing with her youngster doesn’t satisfy her (MedicineNet.com).

One more definition guesses that anhedonia doesn’t really mean one’s ineptitude of satisfaction and bliss. Rather, it expect anhedonistic individuals can’t support their positive feelings about specific occasions that cause them (Psychology Today). From this perspective, anhedonia is portrayed by the triviality of positive feelings. For instance, in the event that an anhedoniac individual had a sentimental night and, at that point kissed their enthusiasm just because, the pleasure from this occasion would be powerless, and would last just for several minutes. Be that as it may, by and by I would scrutinize this definition, as people have changing degrees of seriousness with regards to passionate responses.

In view of the material recorded above, anhedonia can be characterized as a side effect of sadness that is described by a person’s powerlessness to feel joy from their interests, or exercises that are generally viewed as blissful, (for example, correspondence, sex, playing with their youngsters, etc). In spite of the fact that there exist definitions that mark anhedonia as a diminished maintainability of constructive sentiments, I would differ with it, as individuals don’t have similar degrees of seriousness of their enthusiastic responses; as indicated by this definition, the individuals who feel shallow euphoria rather than full-scale joy could be considered anhedoniac. Anhedonia is anything but difficult to mistake for discouragement, yet these two terms are extraordinary.

References

Brynie, Faith. “Misery and Anhedonia.” Psychology Today. N.p., 21 Dec. 2009. Web. 01 Apr. 2014. <http://www.psychologytoday.com/blog/cerebrum sense/200912/wretchedness and-anhedonia>.

“Meaning of Anhedonia.” MedicineNet.com. N.p., n.d. Web. 01 Apr. 2014. <http://www.medter

 

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