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All Blog Posts Tagged 'variable' (3)

How do you know what independent variables to include in a regression model?

After a few biostatistics classes, I began fitting my first logistic regression model using my physician friend’s data on tumors excised from skin cancer patients. I realized that although we were very clear about the dependent variable we were trying to predict – a certain feature of the tumor – I really did not know how to pick the independent…

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Added by Monika Wahi on November 14, 2020 at 10:30am — 1 Comment

Omitted Variables in Linear Regressions

The importance of completeness of linear regressions is an often-discussed issue. By leaving out relevant variables the coefficients might be inconsistent.

But why on earth?! 

Assuming a linear complete model of the form:

z = a + bx + cy + ε.

Where z is supposed to be dependent, x and y are independent and ε is the error term.

Now we drop y to check…

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Added by Frank Raulf on November 13, 2019 at 2:00am — No Comments

Question related to ordinal and scale in SPSS

Hi All;

suppose I am working on Job Satisfaction. I have a question Hours worked each week ________

 and the possible values are

(1) Extremely Dissatisfied 

(2) Dissatisfied

(3)Somewhat satisfied

(4) Satisfied

(5)  Extremely satisfied

Should I treat this variable ordinal or scale?

 

Added by Abdul Samad on November 18, 2015 at 10:43pm — No Comments

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