# Tagged Questions

180 views

### Why some people test regression-like model assumptions on their raw data and other people test them on the residual?

I am a Phd Student in experimental psychology and I try hard to improve my skills and knowledge about how to analyze my data. Until my 5th year in Psychology, I thought that the regression-like ...
30 views

### Should I use Pearson Correlation or Linear Regression to show the linearity of two sets of numbers？

I have two sets of acceleration data in terms of time. In one set the acceleration increases more linearily than another set. How can I show the linearity difference of the two set of data best? ...
60 views

### Difference between model / line?

I have a dataset. I'm asked to write out the linear regression model. I'm also asked to calculate the least squares regression line. What's the difference?? [[EDIT]]
68 views

### Running time-series regressions on a dataset with large gaps: is it legitimate?

I would like to run a plain-vanilla time-series regression, to estimate the sensitivity of my dependent variable to a set of explanatory variables. However, instead of running the regression on the ...
75 views

### How can I assign a quality to a regression based on the number of data points?

Let's say I want to create a line of best fit to approximate the relationship between years of golf experience, and average golf score. If I have only 4 data points, my line of best fit will have a ...
33 views

### Discretizing all attributes vs. discretizing only the class label

I have a numeric dataset and I would like to apply classification algorithms on it. So I am using Weka's Discretize filter to convert the numeric values to discrete. However I wonder what can be the ...
28 views

### Panel data by subgroups

Panel data by subgroups I have a panel dataset on 200 firms showing the turnover of financial managers and firm performance for ten years. Some of the individuals are fired and some get promotion ...
29 views

### Inference in a mix of two datasets with different features

The other day I was wondering this: Let's say that I have two experiments, a sample $N = N_1 \cup N_2$ and a set of features $F = F_1 \cup F_2$. In the experiment 1, from the $N_1$ sub sample are ...
69 views

### validating a regression model

I want to build a regression model to predict daily income from customers. I have 2 problems: 1. Choosing data for the training set - do I use daily income from 1 month ago, 6 month ago etc. 2. How do ...
70 views

### Constructing a measure versus using an interaction

My dataset is sports data and the outcome variable is wins in a season and I am trying to see the affect of the characteristics of the players on the team on this outcome. My question is, is it easier ...
70 views

### Determining optimal height for regression tree

I have a data set of approximately 400,000 records (for those of you who know, the data set is the one provided by yahoo for their yahoo learning to rank challenge). From this data set I learn a ...
88 views

### Is there a method to know if we can apply regression to certain dataset and obtain satisfactory results?

I am working on 84 images, where each image is assigned a target value Y (could be any measure such as blur or noise level). Y is already known for all images. Features X (predictors) are extracted ...
86 views

### How to compile data from annual reports?

I am doing a study of the relationship between two items say A and B. The data consists of information printed on the annual reports from say 2000 - 2010 (10 years). For each item, i.e. A and B there ...
3k views

### What is the difference between pooled cross sectional data and panel data?

They seem so similar. Are they the same thing but just referred to as different names?
102 views

### Learning from relational data

Settings Many algorithms operate on a single relation or table, while many real-world databases store information in multiple tables (Domingos, 2003). Question What types of algorithms learn well ...
363 views

### High-dimensional Regression Datasets [closed]

Am looking for pointers to publicly(online) available high-dimensional regression datasets for evaluating my research work. By high-dimensional, am looking for regression datsets with the number of ...
147 views

### Simulation of covariates in regression

I am doing a simulation study on a simple linear regression model to see how well OLS estimator performs. I am planning to use coverage probability to assess the estimation of slope parameter using ...
1k views

### Simple Multivariate Regression with Octave

For the last 2 months, I've been trying to do any kind of multivariate regression, but I haven't had much luck. I hear Octave is simpler and more intuitive for these kinds of tasks, so I thought I'd ...
261 views

### Logistic regression with longitudinal data

I have longitudinal data (one measurement being continous and the other ordinal) and I want to fit a model which takes into account the correlation between these two measures. I am using stata. Can ...
118 views

### Subdividing a dataset

I know I can subdivide a dataset by socio-demographic factors such as gender, age, income level etc. and analyse the responses for each set separately and then compare the results. For example, I am ...