Questions tagged [frequency-severity]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
-1
votes
1answer
26 views

Finding C for a PMF of a frequency distribution

N has probability mass function: $p_o = p_1 =0$ and $p_k = c/k!$ for $k=2,3,4,...$ I used exp series $\sum_{n=1}^{\infty} \frac{x^k}{k!} = e^x$ to get $ c\sum_{n=1}^{\infty} \frac{1}{k!}$ then $ce=1$ ...
0
votes
1answer
45 views

Find $E[N^2 | N > 2]$ for a frequency distribution

N has probability mass function: $p_o = p_1 =0$ and $p_k = \frac{1}{(e^1-2)k!}$ for $k=2,3,4,...$ I Solved for the pgf of N and got $G(t) = \frac{e^t}{e^1-2}$ How do I calculate $E[N^2 | N>2]$?
1
vote
0answers
30 views

Determining rating function for severity measure

I have data of a medical experiment and want to run a linear regression. More precisely, I have severity degrees of a disease of two independent groups (treatment and control group). The severity ...
7
votes
1answer
2k views

Tweedie p parameter Interpretation

From Wikipedia (http://en.wikipedia.org/wiki/Tweedie_distribution) we know that The Tweedie distributions include a number of familiar distributions as well as some unusual ones, each being ...
2
votes
0answers
118 views

Ordinal logistic model in R

I have the neuropsychiatric questionnaire scores of 300 individuals, of which 200 are normal, and 100 have the disease. The questionnaire is divided into 12 categories (delusion, agitation, ... etc). ...
3
votes
0answers
270 views

Changepoint Analysis in R for Time Series Data

I'm new to R and statistics in general. My background is in Software Development, and I've tasked myself to solve a problem in a 3rd party application. This application is a Game, and I'd like to ...