The odds of an event is the ratio of the probability that the event will happen (p) to the probability that it will not happen (1-p).

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Winning Poker criteria in PLO against a player who always raises

I was considering an interesting situation. Imagine you are playing poker against someone who is always raising in a tournament game (both start with a stack of chips, and win when they have the other ...
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1answer
67 views

Logistic Regression Odds Interpret

I was analyzing the different treatments applied to products. It started out with a a plethora of variables but I came to the conclusion that I can essentially only control the treatment applied so I ...
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11 views

Odds Ratio in 2*3 Table

How can calculate Odds Ratio in 2*3 Table ( Participante [case -control] and marker [genotype])?
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33 views

Interpretation of clogit coefficients (Survival package in R)

Still very very new to R! I've run a conjoint (choice) experiment that uses the function clogit. Output as follows: (this model has been obtained through stepwise methods) ...
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13 views

Calculating Stocks/Shares Odds

I am interested in the calculation of odds for stocks. For example, sports odds are like so: Turkey vs Ukraine hwin, draw, awin 2.20 3.40 3.20 2.20 for a ...
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29 views

Alternatives to proportional odds mixed effects models

I was doing some reading about categorical data analysis (e.g. Agresti (2010): Analysis of Ordinal Categorical Data). Additionally to analysing data with an ordinal response with the help of ...
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1answer
19 views

Interpreting odds in a logistic regression

I am having some problems interpreting the odds. I run a logistic regression for an out come 'Yes' or 'no'. My reference category is 'No'. I have 2 variables and this are the log(odds) and the odds: ...
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44 views

Statistics of 7 game playoff series

Background: a friend of mine makes a hobby (as I imagine many do) of trying to predict hockey playoff outcomes. He tries to guess the winning team in each matchup, and the number of games needed to ...
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28 views

How to calculate prevalence ratios?

In a reviewer request from a submitted manuscript, they requested that I use prevalence ratios instead of odds ratios. The reviewer says: Using logistic regression when prevalence of outcome is ...
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26 views

Calculating posterior and prior odds

Question: Now, I'm confused about assigning probabilities here. I find $P(A^c|E) = (.001)(.99) = .00099$ and $P(E|A) = .99$, but what about the first two sentences? Does that mean that $P(E) = .001$ ...
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1answer
147 views

Odds ratio traps 1 when p value significant

I have a set of imputations on which I'm using PROC GLIMMIX to build a regression model for a binary outcome. I'm using PROC MIANALYZE to roll up the output, part of which includes upper and lower ...
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27 views

How do I predict a person's rank given a set of characteristics?

I'd like to predict a person's rank on a list (1 being top ranked, 50 is last -- ties are allowed, i.e., two people can occupy the #2 rank) given a set of characteristics (e.g., age, occupation, ...
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2answers
340 views

% chance, when the success rate goes up with every failure

In an online game the chance of succeeding at an action starts at 5% and goes up 5% every time the action fails. Upon success the chance resets back to 5%. (So you know how they say a die has no ...
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0answers
67 views

Odds of winning one of $p$ prizes with $t$ tickets entered

How do you calculate the odds of winning one of 10 prizes if you have $t$ tickets entered in a drawing with $T$ total tickets? Each person can only get one prize. A person with 20 tickets entered ...
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2answers
584 views

Odds and odds ratios in logistic regression

I am having difficulties understanding one logistic regression explanation. The logistic regression is between temperature and fish which die or do not die. The slope of a logistic regression is ...
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3answers
347 views

How can I predict the odds that a dodgeball team is going to win based on the winning history of its players?

Imagine there are 80 dodgeball players in the world. Each of them has played thousands of dodgeball games with the other 79 players in more-or-less random order. This is a world without teams (e.g., ...
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4answers
755 views

Calculating odds for a cricket match

I'm writing a program to help me gamble on cricket, but have run into a wee problem. I've got loads of data from previous games already and have compiled various stats from it. I have calculated that ...
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2answers
168 views

How to compare whether the odds of success of different levels of a predictor are different from 0

I hope I am able to word my question clearly. Suppose I have a model below: glmer(Y~X + (1|subject), family="binomial", data=dat) The intercept is the log odds ...
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215 views

Proportional odds model with random effects

I have a survival data set. I want to see the cluster specific variation, which we usually can do by using Cox proportional hazard model with frailty. But, the constant hazard ratio assumption of Cox ...
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2answers
126 views

“Exposure” and “Outcome” can be switched without changing the odds ratio?

I'm enrolled in an introductory course in statistics. In one of my lecture notes, the instructor explains why Odds Ratio is popular and he mentions: "Exposure" and "Outcome" can be switched without ...
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2answers
801 views

Can individual odds ratios be added to get one pooled odds ratio to compare to a reference group?

I have the admission for 4 different hospitals (coded as binary) which are regressed on a list of independent variables. The multinomial logistic provides the odds ratio (O.R.) for independent ...
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2answers
910 views

Prerequisite for conversion from odds ratio to relative risk to be valid

as question, since we can do the conversion from odds ratio (p1/q1)/(p2/q2) to relative risk (p1/(p1+q1))/(p2/(p2+q2)) fairly ...