# Tag Info

1 vote
Accepted

### what is the difference between these two expressions

Usually none, since you can simply flip the sign on your coefficient. There is a difference of course if during model fitting you constrain your parameter to be (say) nonnegative. Or if you regularize ...

### Joint and conditional probability with Poisson and Binomial distributions

Simple and short I started below with some long computation starting from your erroneous $P(X \ge 3, Y \ge 1)$. Trying to make an intuitive interpretation of the end result it made me realize that we ...

### What exactly is likelihood?

Let $f_\theta$ be the probability (mass or density) distribution function of a random variable $X$, which depends on some given parameter $\theta$ then you can write:  f_\theta(x)= f_\theta(x | \...
1 vote
Accepted

### What exactly is likelihood?

Let $X$ be a random variable, specifically a continuous random variable. If $x$ is a specific value that $X$ can output then the probability that $X = x$ actually happens with probability zero. So it ...
This problem has its roots on compound Poisson process. The correct way of approaching it is to express the number of boys $X$ in a household as \begin{align*} X = D_1 + \cdots + D_N, \end{align*} ...