Statistical Modeling

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Questions related to Statistical Modeling

What model-building method will I use to find the effect of multiple continuous independent variables on a dependent variable?

I have behavioral data (feeding latency) which is the dependent variable. There are 4 populations from which the behavioral data is collected. So population becomes a random effect. I have various...

04 April 2015 9,861 7 View

What is the best approach to select input variables in Artificial Neural Networks (ANNs)?

The selection of input variables is critical in order to find the optimal function in ANNs. Studies have been pointing numerous algorithms for input variable selection (IVS). They are generally...

04 April 2015 5,909 6 View

Can someone point me towards tight bounds for the cumulative distribution of a multinomial ?

I would be grateful for pointers to tight bounds fo the cumulative distribution of a multinomial (tight meaning tighter than the lower bound that can be obtained from the union bound ! pointer to...

26 March 2015 4,704 4 View

What are the permissible limits of SSE, SLE & SAE?

For best fit the statistical quantities used as performance indicators should move close to zero. Sometimes the model efficiency (NSE) is exceptionally good but performance indicators...

22 March 2015 2,836 3 View

How to conduct mediation analysis on a variable characterised by zero-inflated count data?

I am presently using the mediation package in R-statistics and am trying to fit the mediator using an ordered probit model. The problem is that I return the following error: "insufficient...

19 March 2015 9,161 3 View

Can I use aggregated data to make predictions using logistic regression model that was built based on data at the individual level?

I used survey data for individuals to identify the significant variables that contribute to the evacuation decision. This was done through using backward step-wise method of the logistic...

09 March 2015 4,642 8 View

Can I use aggregated data to make predictions using logistic regression model that was built based on data at the individual level?

I used survey data for individuals to identify the significant variables that contribute to the evacuation decision. This was done through using backward step-wise method of the logistic...

03 March 2015 526 9 View

Can someone point me towards tight bounds for the cumulative distribution of a multinomial ?

I would be grateful for pointers to tight bounds fo the cumulative distribution of a multinomial (tight meaning tighter than the lower bound that can be obtained from the union bound ! pointer to...

03 March 2015 5,016 5 View

What are the permissible limits of SSE, SLE & SAE?

For best fit the statistical quantities used as performance indicators should move close to zero. Sometimes the model efficiency (NSE) is exceptionally good but performance indicators...

03 March 2015 5,462 3 View

How to conduct mediation analysis on a variable characterised by zero-inflated count data?

I am presently using the mediation package in R-statistics and am trying to fit the mediator using an ordered probit model. The problem is that I return the following error: "insufficient...

03 March 2015 8,644 3 View

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 4,547 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 917 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 9,495 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 420 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 9,637 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 1,565 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 1,236 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 6,155 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 3,898 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 7,014 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 8,218 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 6,460 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 9,518 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 2,549 5 View

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