Linked Questions

13
votes
1answer
6k views

Why do we use GLM? [duplicate]

I'm trying to justify using of GLM model in my project instead of a simple linear regression. A lot of sources that I've seen contain the statement that "GLM allow us to build regression models for ...
0
votes
0answers
67 views

Modeling count data [duplicate]

Why do count data need to be modeled differently from the standard linear regression model ? Any simple example will suffice.
22
votes
1answer
8k views

Goodness of fit and which model to choose linear regression or Poisson

I need some advice regarding two main dilemmas in my research, which is a case study of 3 big pharmaceuticals and innovation. Number of patents per year is the dependent variable. My questions are ...
5
votes
1answer
2k views

Interpreting regression with transformed variables

I have conducted a linear regression analysis with four variables. The response, say $\#$ of eggs per 2000 hens, and one of the predictors, say temperature change, are highly skewed. I have hence ...
4
votes
1answer
1k views

Appropriate application of Poisson regression?

I am looking to predict the number of shots that are going to be made by soccer players in their next game. Currently, I use multiple linear regression, where I regress my entire data set (...
4
votes
1answer
1k views

Using linear regression for count data - will this introduce bias?

Say I am fitting a model to Poisson count data, but I am only interested in estimating the mean of the count variable. I understand a ordinary linear regression is a good approximation when the ...
2
votes
1answer
227 views

Logistic regression across groups

When running a logit/probit model for particular sets of outcomes on a set of participants (whether they did a certain behavior at least two times), how can one best control for differences when the ...
-2
votes
2answers
350 views

Which statistical model should I apply when the DV is a count variable? [duplicate]

What is best statistical model to assess effect of habitat type and year (categorical factors), and ...
0
votes
1answer
182 views

How do I correctly compare bacterial counts from mice with different genotypes?

As far as I know, CFU counts from bacterial suspensions should approximately follow a Poisson distribution. So in order to perform a One-way Anova, a mathematical transformation to achieve normality ...
-3
votes
2answers
98 views

What are the signs that a classification just wont work?

Basically, I've a simple question: Are there signs which tells me that I just can't classify my data? To make things clear, I've a dataset whereby i try to predict the amount of tires changes. But ...
1
vote
0answers
62 views

How to compare counts to find out which are significantly different

I have a one way unbalanced anova say with a levels. My task is to find out if we have significantly different COUNTS at the various a levels. I tried this : I compute the sum of the number of cases ...
0
votes
1answer
39 views

What test should I use for my data?

I have one categorical predictor coded as 0 or 1 for a sample of about 290. Based on some research, I want to control for 4 covariates. One is continuous (age) and the rest are categorical (gender, ...
1
vote
1answer
34 views

How to establish the effects of a competitor near my store location?

As part of my studies of statistics, market analysis and data analysis, I’m facing the following problem but not sure if the answer I’m proposing it is correct or not. A commercial retail store with “...
1
vote
1answer
25 views

People count regression analysis

I have data of number of customers entering a business and number of customers leaving a business every 15 minutes. I need to predict the number of people that will be entering and leaving the ...