# ::Free Statistics and Forecasting Software:: When multicollinearity occurs, least squares estimates are unbiased, but their variances are large so they may be far from the true value. Dear sir, Im trying to find out what method to apply when analysing results from a questionnare. See also the part of the website that relates to the simple case that you describe, namely: May 9, at 5: If I have one independent variable for multiple datasets and I add another for time, then time is also treated as a variable and assigned a coefficient which should not be the case.

## Multiple Regression I understand that there is no general agreement for how to do this. Dear Sir, thank you very much for your response. Now the results of regression analysis are updating as per the changes in the data set. Dear all, I am Jai, I am using this regression analysis for Weibull calculation, but I am looking for some kind of procedure, by which the regression analysis will update automatically.

Because currently if I change the input data, then only graph is changing other calculations are not changing, so if I change the data then I have to run regression analysis once again I would really appriciate, if someone can provide me the details about autoupdation of Regression Analysis.

The Regression data analysis tool provided by the Real Statistics Resource Pack will update automatically when the data is changed. It also handles 64 independent variables instead of only 16 variables supported by the standard Excel Regression tool. You can download the Real Statistics Resource Pack for free by going to the webpage http: Please make sure that you install the software as described on that webpage.

I need to carry out multiple regression analysis on ordinal satisfaction measures independent variables. There are three parameters each categorised into factors and subfactors variables. Each subfactor includes multiple questions to get satisfaction rating. Thus summing up the scores from questions to subfactors; subfactors to factors; factors to each respective paramater and finally combined score of all three parameters considered as score of the aspect of interest.

My first question is whether the method is correct, and second is which specific regression analysis method should I use. Sample size is households within 16 clusters equally divided into two categories. Charu, The approach seems reasonable from what I understand, but with such little detail I cannot say whether the method is correct or not, nor which type of regression analysis to use.

Can you please help me for future projection which statistical formula will be helpful. Depending on what the data looks like multiple regression might be a way to make the projection. Or do you have monthly or weekly data for the 3 years?

I ask since with only 3 data elements, projections will be somewhat limited. I am doing my research using likert scale effect of attitudes as dependent variable to english performance ind.

What stat tool would I employ? It really depends on what you are trying to demonstrate. What hypothesis are you tryin to test? It is not sufficient to say how many variables you have. Zaiontz, I am conducting a study with 4 independent variables and one dependent variables. These 4 independent variables include 3 survey data and the other one is method of teaching. The dependent var is grade. Can I use multiple regression? How am I going to come up with a regression model?

Niel, Yes you can use multiple regression, although the assumptions will likely not be fully satisfied. As to how to do it, please read the website. And not around The result is clearly off and contribution from Crime is significantly higher then contribution from first 2 factors. This would make sense if first 2 factors do not correlate at all with Poverty but i think this is not the case. I made two typing mistakes when I copied the coefficients in Figure 3.

The correct regression line should be:. The usual multiple regression model would have two independent variables and one dependent variable. Since you have two dependent variables and one independent, you can create two separate regression models with one dependent and one independent variable. If you want a single regression model with two dependent variables then you probably want multivariate regression.

R provides this capability. I8 at figure 2 of multiple regression analysis. TREND is an array formula. It is essential that you press Ctrl-Shift-Enter and not just Enter after inserting the formula. If this is not the problem, let me know. Your email address will not be published.

Real Statistics Using Excel. Statistics Primate Yolande says: March 17, at 8: March 17, at 9: March 2, at March 8, at 8: July 5, at 4: May 8, at 3: May 9, at 8: Brett, If I understand correctly you want to do polynomial regression with more than one independent variable. April 28, at 8: April 29, at 7: April 29, at 9: May 9, at 5: April 25, at 9: April 26, at 2: March 25, at 2: Hi, I was wondering how to perform a multiple regression analysis using MS Excel if there are gaps in the main dataset dependent variable and a response time between the dependent variable and the two predictor variables.

March 25, at 6: February 11, at 9: February 11, at November 13, at November 13, at 6: November 13, at 8: October 18, at 2: October 18, at 5: September 21, at 8: September 22, at Tanvir, Is the outcome from the model a numeric credit score or an assignment of some evaluation excellent, very good, good, etc.

September 22, at 9: September 28, at August 20, at 3: August 20, at August 4, at July 8, at 8: Dear Charles, Thank you for the article.

I would like to get your advice on a project I am working on. Appreciate all the help I can get, thank you. July 9, at 7: July 7, at 7: Here is the scenario: Any help would be appreciated! July 8, at 6: July 8, at 3: June 23, at Dear sir Good morning. June 24, at 6: April 16, at 8: April 18, at Abhi, You need to provide more information before I am able to respond.

February 23, at January 25, at 2: Hello, I am trying to create a predictive model for earnings of automotive companies using a multiple regression model. January 25, at 5: January 25, at 6: I ve picked the 10 biggest companies by units sold. January 26, at 9: Aamir, Thanks for providing this essential information that was missing from your original description.

July 4, at 7: July 4, at 9: January 6, at 6: January 7, at Please look at the following webpage for how to do this http: January 11, at 3: January 11, at 6: January 5, at Please suggest the steps to follow, while building a strong multivariate regression model.

January 5, at 2: August 19, at 8: Hi, I am slowly picking up in learning regression techniques. August 22, at You can find information about this subject at Testing extra variables in multiple regression Also relevant are Interaction Polynomial regression Charles.

September 21, at 3: Hi Charles, I am trying to predict the next days stock price based on past data with todays open values.

I wanted to do multiple regression but excel does not support for these 21 variables. Could you please suggest the best approach to predict the next days price? Hi Charles, Small correction, typo in earlier message I am trying to predict the next day stock price based on past data with next day open values. September 23, at 8: September 30, at August 13, at 2: August 13, at 6: Hello Gabriella, To determine whether you will get a significantly better result with three variables rather than two, you can use the RSquareTest , as described on the webpage Testing the significance of extra variables on the model.

You can calculate the variance inflation factor using the Real Statistics VIF function, as described on the webpage Collinearity Finally, with three you can calculate the multiple correlation using the Real Statistics MCORREL function, but you do need to pick one of the variables as the dependent variable.

Anh Le Thai says: July 31, at 2: Thank you very much for reading my questions. July 31, at 8: Anh LT, If you need the data to be normal then you should use the data after the log transformation, otherwise you can use the original data.

The following is a very simple example: April 24, at 9: April 25, at 7: April 9, at 3: Dear sir, Im trying to find out what method to apply when analysing results from a questionnare. April 9, at 4: April 10, at 8: April 17, at 8: March 28, at April 2, at Kiran, If I understand correctly, your data can be organized as follows: March 21, at 9: March 21, at February 16, at 1: February 16, at 9: February 16, at January 26, at January 9, at 7: January 9, at 8: December 28, at Many thanks in advance Alicia.

December 29, at 2: December 2, at 1: December 2, at 4: November 27, at 2: So kindly do the needful to resolve the issue. Thank you once again for your support. November 14, at 1: November 17, at 6: November 27, at 4: Dear Sir, I need to carry out multiple regression analysis on ordinal satisfaction measures independent variables. November 11, at 5: Can you please help me for future projection which statistical formula will be helpful Thanks.

November 11, at October 2, at October 2, at 6: October 2, at 4: October 2, at 5: October 2, at 7: Please be more specific. What would you like to find out about such questions? August 9, at 5: I might be wrong but it appears to me that something is a bit off….

August 19, at We make no warranties or representations as to the accuracy or completeness of such information or software , and it assumes no liability or responsibility for errors or omissions in the content of this web site, or any software bugs in online applications. Under no circumstances and under no legal theory shall we be liable to you or any other person for any direct, indirect, special, incidental, exemplary, or consequential damages arising from your access to, or use of, this web site.

Patrick Wessa , PhD Server: The non-commercial academic use of this software is free of charge. The only thing that is asked in return is to cite this software when results are used in publications. This free online software calculator computes the multiple regression model based on the Ordinary Least Squares method.

Column Number of Endogenous Series? Cite this software as: Chapter 4 of Statistical Models in S , eds J. Borghers, E, and P. Free Statistics and Forecasting Software:: Data X click to load default data.