Posts Tagged “ggplot”

Frequentist German Tank Problem

March 21, 2014 . .
When you go to war, it can be useful to know how many tanks the other side has. However, they often refuse to tell you. Worse even, they will often vastly inflate production numbers. They are at war, after all. If only there was a way to convert that pesky sequential serial number to an estimate of the total number of tanks...
statistics ggplot r frequentist

Bayesian Search Models

March 14, 2014 . .
Whether you have lost a sub, hydrogen bomb or just your keys, Bayesian search theory can help find it!
statistics ggplot r bayesian

Instrumental Variables Simulation

January 10, 2014 . .
Instrumental variables provide a power method for getting around unobserved heterogeneity and are increasingly popular in observational research. By exploiting a third variable, known as an instrumental variable, this method breaks the correlation between an independent variable and theomitted or unobserved variables. However, the definitions are mind boggling and the process is often unclear, even when advertised as "Mostly Harmless." In cases like this, a simulation is often handy, especially ones written in R.
statistics ggplot r shiny

Penalizing P Values

November 20, 2013 . .
If I told you I saw bigfoot, would you believe me? Could I present any evidence that would change your mind? Probably (hopefully) not. The likelihood of bigfoot being real is so small that the only people who report seeing one are also the same people who "believe" Ancient Aliens belongs on the History Channel. But if you think that way and penalize an extraordinary claim, why do we use statistical inference that doesn't do the same thing? Could this be the cause of the the rash of high profile failures to reproduce studies and the "decline effect"?
statistics ggplot r shiny

TV Ratings Myths

August 29, 2013 . .
Everyone loves TV and hates it when their favorite show gets canceled. That is why they refuse to watch shows on Fox or watch anything that is airing Friday evening. But do these commonly held beliefs hold true? Does Fox hate TV and is Friday night a graveyard for scripted TV?
statistics regression ggplot r tv fun