Emilio José Chaves

8 Questions 226 Answers 0 Followers

Questions related from Emilio José Chaves

Is this method valid to generate an artificial dataset?

Suppose there are 4 strata groups that conform universe. Each one has its own different ordered media and the same frequence=1/4. I want to generate random values from their cummulative population...

06 June 2014 9,847 0 View

Can anyone help with the addition of two sectors A,B with different Struc.Eq.Models, medias, and fractions of population?

Simulating the case it is found that the result for total universe "A and B" does not resemble the SEM shape of the sectors. This analysis is important in econometrics where urban areas incomes,...

05 May 2014 2,595 2 View

Can any mathematician explain why this equation tends to 1/e, e=the Neperian base 2,71828319 ?

Working Pareto's distribution in Excel, I use the function P=F ^ [1/(1-F) ] to estimate the fraction P that receives more than one media. When F value approaches 1 from below, it results that P...

04 April 2014 8,877 7 View

What should statistics professors teach first to young, new students?

When a total universe with media T is made of two groups with medias K1 and K2, and population fractions X and X2 respectively, it applies that total media, T = K1*X + K2*(1-X) [1] . This means...

02 February 2014 9,051 2 View

Is the main purpose of data analysis to develop a good model of CDF based on data or is it to postulate a general distribution model for any sample?

If I prefer a particular parametric model, that does not authorize me to recommend it as a basic referent to be applied or tested to all univariate samples. This may be the biggest practical...

01 January 2014 5,215 4 View

May a variable be both dependent and aleatory at the same time?

Suppose cumulative population fraction P –from zero to one- is the independent variable, X is dependent of P through the relationship X=a*P^(a-1) [1]. In this case “I think” that P must be chosen...

01 January 2014 2,426 2 View

How to control the ethical practices of statistics and sampling?

There is this exponential univariable function of aleatory fractions of population, p, useful to represent any data set ordered from high to low values of measured variable X. X(p) = (p^F)(F/p +...

01 January 2014 4,077 8 View

What is the mathematical sense of Probability Density Functions?

I understand that PDF is the derivative dXac/dK where Xac=cumulative population and K=variable value. So if we can express K as a continuous function of Xac, and we can estimate dK/dXac then PDF=...

12 December 2013 4,793 7 View