Tagged Questions

1
vote
2answers
70 views

Help with Anova of categorical and continuous variable in R and SPSS output

I am having some trouble running an Anova on categorical variables in R and matching SPSS output. What I need to do is run an anova on the dataset below (its a made up data set). But, I need to know ...
0
votes
0answers
31 views

Analyzing reflected and transformed variables

I want to perform multiple linear regression on my variables; since my dependent variable was negatively skewed, I reflected it and then I log transformed it. My independent variables was positively ...
0
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0answers
86 views

How do I perform a cox regression analysis while adjusting for a variable?

I would like to perform a multi-variate cox regression model looking at various factors influencing the risk of recurrence of disease such as BMI, age, year of surgery, etc. Some of these patients ...
1
vote
1answer
344 views

Can non normal data be used for factor analysis and multiple regression? If so what is the procedure to justify it?

While I was writing up the analysis in my thesis, I just came across when rechecking my test for normality, that the p-value for most continuous variables was .000, which is less than .05, and it ...
0
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0answers
15 views

Relationship problem in multiple linear regression on SPSS [duplicate]

Possible Duplicate: Why is there a difference in signs of regression coefficients of same variable in a simple regression and multiple regression on spss When I perform Multiple Linear ...
2
votes
2answers
264 views

Can Cox regression be used to assess the difference between two treatments

In this project our objective was to compare the revision rates between two surgical techniques. We have time to revision (time between two surgeries), demographics, and other variables we are ...
1
vote
0answers
403 views

Differences between Stata & SPSS in multiple regression outcomes

I'm a graduate student working on a thesis whose aim is to test complementarity between 2 practices (CI and INNO, according to theory of supermodularity). To do so, I calculated two new variables ...
6
votes
1answer
459 views

Multiple imputation questions for multiple regression in SPSS

I am currently running a multiple regression model using imputed data and have a few questions. Background: Using SPSS 18. My data appears to be MAR. Listwise deletion of cases leaves me with only ...
0
votes
2answers
646 views

SPSS syntax to produce two-tailed test for regression

I have some syntax for SPSS and it produces everything that I need perfectly, although for some reason it spits it out one tailed instead of two tailed. Is there any way of editing this syntax so that ...