Statistical Modeling

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Questions related to Statistical Modeling

How do you create group with a variable?

Hello I´m looking for the best process to create group within a variable. For example, how to group age with minimum 24 and maximum 81. I ever use quantile. But the limit is that only i can get 4...

03 March 2015 4,679 10 View

What is the difference between autoregressive, auto-regression and multiple linear regression?

I have developed three neural network models for monthly rainfall forecasting the first has three input, which is the values of the previous three months. the second has six inputs and the third...

03 March 2015 1,024 5 View

Why is Nakagami-m fading channel a good in practice in place of Rayleigh fading ?

I don't know my question is correct or not ?

03 March 2015 9,606 8 View

How can I regress macro-economic data on panel data?

I have got panel data of 200 companies for 10 years, i.e. 2000 observations. For example, if I collect macro-economic data of GDP (per year data) for 10 years it will be 10 observations . How do I...

03 March 2015 546 9 View

Is there a good way to "normalize" electoral volatility?

I'm specifically interested in electoral volatility. It measures the aggregate change in votes across all parties between two elections. But what if the distance between elections (in years)...

02 February 2015 9,703 2 View

Looking for PhD Supervisor in food security analysis?

I am looking for a professor to supervise my PhD topic - statistical modelling in food security status of the population

02 February 2015 1,626 0 View

If your data is strongly non-linear, then how should be it treated?

I have data of biological parameters and physico chmecial features which show show strongly non-linear relatiosnhip. How should I treat these type of data... Is Genralized linear model stat. test...

02 February 2015 1,326 14 View

Is there a good way to "normalize" electoral volatility?

I'm specifically interested in electoral volatility. It measures the aggregate change in votes across all parties between two elections. But what if the distance between elections (in years)...

02 February 2015 6,221 2 View

Can someone suggest the Empirical bayes estimate of Mean and Variance formula for Normal case proposed by Morris ?

Empirical Bayes estimate of Mean and Varriance formula proposed by Morris for Normal case

01 January 2015 3,984 4 View

How to appropriately account for errors when fitting a mathematical model to summary data which represent percentiles (e.g. median) of a histogram?

The data provided are percentiles (median, 75th and 90th) from several histograms. The number of observations comprising each histogram is known. The shape of the data distribution in each...

01 January 2015 7,096 5 View

Can the value of A be calculated in the function y = ax + b, if B is an unknown variable instead of a constant?

Let ( x(i), b(i), y(i) ) be a 3-tuple of real numbers. i=1,...,n can be interpreted as discrete time, meaning that x(i+1) occurs after x(i).x(i) and y(i) are observable, whereas b(i) is not...

01 January 2015 8,287 4 View

Does anybody know that from where we can get predictor variable for SDSM?

does anybody know that from where we can get predictor variable for SDSM?because http://www.cics.uvic.ca/scenarios/index.cgi?scenarios...is not available anymore...

01 January 2015 6,527 3 View

What is the difference between the mechanistic and statistical modeling?

I am trying to develop a mechanistic model integrating satellite images, can you help me to understand these type of modilisation. thank you very much

14 December 2014 9,674 13 View

How do I determine the significance of input data series with the output?

What appropriate method (may be statistical) can be used to find the statistical significance of a particular input data series with the observed output? I am concerned about the non-linear data...

14 December 2014 2,624 5 View

What is the best method for assessement of model?

I'm totally confused about many parameters for assessing the model.

12 December 2014 7,918 0 View

Does anybody know how to perform an ANOVA in an augmented design and obtain the significance of the GxE factor?

I need to obtain the significance of the GxE factor of the ANOVA performed with multiple environments (n=8) in an augmented design with data adjusted with BLUPs (Best Linear Unbiased Predictors).

12 December 2014 3,836 6 View

How do you test for autocorrelation in a random effects model?

Using gretl, I run my model as RE. From there, how do you test for autocorrelation?

12 December 2014 4,461 3 View

Meta analysis: How to calculate the impact of unpublished data on result of analysis?

While considering studies for inclusion into a meta analysis on a particular subject, some studies (mostly with negative results) that are unpublished may remain un-included, even after best...

12 December 2014 2,901 22 View

How can I correlate the amount of rainfall to a catchment basin with respect to three rain gauges, depending on the typhoon track and its duration?

I'm working on a flood model of an urban area. My problem is, I want to input rainfall data of a Typhoon with respect to three different gauges. I know that these gauges will give different data...

12 December 2014 7,532 9 View

What other techniques or tools are available in assisting the determination of the number of factors to retain in Exploratory Factor Analysis?

From my reading and understanding, the Kaiser's criterion of eigenvalue greater than 1 and finding 'elbow' in the scree plot are two common practices (each with argument). Also, there is Parallel...

12 December 2014 1,905 15 View

How can I optimize the random effect structure in a GLMM?

I am using generalized mixed models using glmer function of the “lme4” package. Glmer() always uses Maximum Likelihood (ML) rather than REstricted Maximum Likelihood (REML)...

12 December 2014 8,534 9 View

What are the possible ways to build and interpret the nested model with multi-group analysis in AMOS program?

The objectives of my ongoing work are (1) examining construct validity (2) factorial validity, and (3) cross validation with multiple independent samples in a single country context. For...

12 December 2014 3,652 2 View

What is the difference between the mechanistic and statistical modeling?

I am trying to develop a mechanistic model integrating satellite images, can you help me to understand these type of modilisation. thank you very much

12 December 2014 2,730 11 View

How do I determine the significance of input data series with the output?

What appropriate method (may be statistical) can be used to find the statistical significance of a particular input data series with the observed output? I am concerned about the non-linear data...

12 December 2014 3,136 6 View

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