regression

I have several pieces of data available, but I'm not sure about the best use of it in a predictive model. I envision using a regression, then plugging the predicted values into a monte carlo simulation for optimization. I'm wondering how an experienced statistician would use the available data...

Hi everyone! I was wondering, how do I deal with a predictor that overshadows all others? All predictors included in the model are statistically significant, but one of the has a very strong impact on the dependent variables, so much that when its value is high, the impact of all other...

Hello, I have a doubt about the ways of comparing categories in logistic regression. I have 200 subjects with a dependant variable (positive/negative) and I want to test them with an independent variable (IV) of 4 categories (age). I am going to use a logistic regression, but when I do that, I...

Hi there, I'm an MSc student in Medical Entomology and I'm in the midst of analysing data for my final project write up. My project is assessing the efficacy of different insecticide treatments applied in experimental huts against malaria mosquitoes. Now my dependent variables are: mortality...

Hi, I would like to compare the effect of different independent variables on a dependent variable. My VD is quantitative. I have 3 VI that are nominal: Valence (2 levels), Rhetorical orientation (2 levels), statement type (3 levels). It looks like that: In order to asses the influence of...

Hello I want to ask you, before to making a regression should we understand which distribution follow the datas? Let's take an example: if the data have a poisson distribution, then I will run a Poisson regression? If the data follow a gaussian then one should use...

Hello, I am a newbie and request some inputs on the usage and impact of indicator variables in regression analysis. I have a weekly dataset and intend to use regression analysis for prediction. To model seasonality, what are the pros/cons of either a) using 12 monthly (weighted) indicator...

Hello dear forum members, I am conducting a replication study based on the paper by Gao, G. G., Greenwood, B. N., Agarwal, R., & McCullough, J. S. (2015). VOCAL minority and silent majority: How do online ratings reflect population perceptions of quality. MIS Quarterly: Management Information...

I have a question on a sample test for my upcoming prelims and I am unsure how to answer a question, scenario and questions below... A study measured dental measurements from the center of the pituitary to the pterygomaxillary fissure (measured in mm) for 11 girls and 16 boys at ages 8, 10, 12...

Hi, I am working on a replication of a research paper where I have to compile my own data to copy the regression done in the research paper. I have never done a regression like this before and I am not sure about the data I chose - I would appreciate any help and input. All the variables I...

Dear all, For my Master’s thesis, I have some difficulties with the statistical part of my research. I want to analyze the relationship between two variables: Investment in Innovation (R&D) --> Concentration Ratio 1. Research & Development (R&D) Investments in an industry 2. Concentration...

Hey guys! So for an assignment I have to compute some long-horizon predictive regressions. Univariate, bivariate and multiple. We use MatLab, but my MatLab skills are very very basic and I need your help, because i can't find the right answer. I collected all my monthly data (From 1963:07 to...

I have data of 11 predictors and 1 response with 1000 observations and i'm doing linear regression on the data. I also have the measurements errors for the predictors (not for the response) and i'm struggling in find out hoe to count for them in the total error estimate, because basic multiple...

My question regards the best way of comparing two groups for differences in the levels of several quantitative parameters. Here, for only one of the groups there are 4 repeated measurements at different intervals. The data -We have two groups we want to compare: one consists of ~200 patients at...

Hi! I have a question on the coding/use of categorical variables: In short, I have two control variables in an SPSS regression model. One is participant (15 levels, or participants) and one other categorical variable (10 levels). And there is just one predictor variable in the model. I've tried...

I'm using a mixed-effects regression model to account for intragroup correlation. Can this be used in both univariate and multivariate analyses?

I am doing some analysis on relationship between bond spread and the factors (like bond rating, originator information, duration etc.). I can do a regular linear regression like spread ~ rating + originator + duration, but my friend using the “multiply way”, and I am not sure if there is any...

I hope you all had an amazing holiday weekend. Currently, I have a dataset that includes company name, company type, service provided, charge for the service, and this is all by month. For example, Company X, type of company is a bank, services provided are debt portfolio evaluations at $100 and...

I'm running a regression analysis to understand the impact of income (predictor variable) on scores on an instrument (dependent variable). The only problem is that I don't know each individual's income; I've estimated it using their ZIP code. I've experimented with a few different methods to...

Hello good people of the internet. I was wandering if someone could help me to validate if my data is in control or not? The data consist of a current output, used by a motor to open and close a lid 1000 times in total (1000 cycles). every time the lid opens and closes once I want to observe...