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27 posts tagged with regression.

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## Statistics; correlations for a subset of a timeseries of points?

I have a time series of data - number of "detections" per hour, over time. Each of these points also has two attributes associated with it, x and y. I also have a second time series of data which I expect to correlate with that number of detections per hour, but only with detections within certain combinations of those x and y values. I want to find what range of x and y values has the best correlation. [more inside]

## Toddler Won't Even Pick Up a Fork Anymore

My toddler (2 years old) has been regressing big time. She regressed on potty training a while back, but that's not what concerns me. Now she refuses to feed herself, she has stopped making verbal requests, she whispers instead of speaking aloud. I'm not asking why the regression, so much as how do I deal with it? [more inside]

## Looking for a Dianetics therapist

Hello,
I'm looking for a therapist who does Dianetics, and who's NOT affiliated with the Church of Scientology. If anyone knows of such a person or persons and could somehow help connect between us, I would be very grateful to them. [more inside]

## Regression equation with mean temperature as output variable

If you had a multivariate equation whose output variable is mean surface temperature on earth, what would be the rough beta value for distance from the sun (in millions of miles or whatever)?

## WHY are you still awake? Sleep regression? Sneaking lattes?

*Baby filter* Our 11ish month old has had two super weird bedtimes ("happy happy party time! Hey, did you know I can make farting noises with my mouth? woohoo!") this week and I'm trying to figure out what might be going on, and more importantly what our options are for dealing with it. All the gory details inside. [more inside]

## Using Excel's regression tools to determine the 95% confidence interval

MS Excel's regression tools provide 95% lower/upper confidence results but how does one properly interpret and then express those as a single ± (plus/minus) figure? [more inside]

## Make my parents' Christmas.

I'm a 40 year old man, recently single and spending Christmas with my parents for the first time in two decades. They're excited, help us have a good one. [more inside]

## Walk me through a multivariate regression

Stats filter. I am doing multivariate regression for the first time and I want to understand what I'm doing, having gone beyond my formal training. I have many possible ways I could formulate the regression (different variables to include) and I want to find a model that is both the best possible fit while using the fewest number of variables. How? [more inside]

## How can I integrate a time sequence of correlations?

Statistics filter: If I asses the same paired variables for the same population at multiple points in time, can I integrate the relation into an overall correlation? [more inside]

## Weighted regression?

Excel statistics question (linear regression with weighted data points) [more inside]

## How do I find a mean response confidence interval in nonlinear regression?

How do I calculate the confidence interval for the mean response of some general nonlinear fit? [more inside]

## Based on my eyes and a hunch I conclude these two variables are statistically different?

How can I test if one predictor variable in a regression is significantly better than another predictor variable?
i.e. If I regress X against A I get an r^2 of .99 and when I regress X against B I get .98. I need a test to see whether this difference is statistically significant. [more inside]

## Potty Training Filter

Parentfilter: How do you handle very specific potty training regression issue with a 2.5 year old girl? [more inside]

## Regression Coefficient Interpretation (OLS)

In an OLS regression the coefficient is b = cov(X,Y)/var(X). What is the plain english interpretation of this coefficient in terms of variations (ie. b is the variation in Y that can be explained by variation in X)?
How does this relate to r^2?

## Regression question....

How do I estimate the coefficients of this curve using linear regression? [more inside]

## Logistic regression and SPSS

Stats filter: Is logistic regression what I need? If so, can I do this in regular SPSS (v17) or do I need the add-on? [more inside]

## She has to go potty...oops...

Suggestions for dealing with an increase in potty accidents in an almost-four-year-old? [more inside]

## Can I get Google Spreadsheets to display a scatterplot of data with the regression line overlaid on the plot?

Can I get Google Spreadsheets to display a scatterplot of data with the regression line overlaid on the plot? How? [more inside]

## Please make statistics stop hurting my head!

Confused by statistics and regression analysis. [more inside]

## linearity without the scatterplot

How do I check for linearity? [more inside]

## Adventures in Data Interoperability

How do I convert a large raster image into a table for analysis and manipulation? [more inside]

## Where to start identifying relationships in a set of numerical, binary, menu data

Ok so I have this huge table of survey data - much of it numerical, much of it binary, some of it from selections from menus of text items (e.g. blue, green, orange etc). Where do I start to find the most noticeable relationships between variables? [more inside]

## Cheap data-fitting software?

Looking for free or low cost (under $50) multiple linear regression software which ideally works with Microsoft Excel (but not critical). Any recommendations?

## Past performance, future results, &c

Statistics-filter: I need to establish to what extent student performance on a particular standardized test is predicted by each of the following: GPA, standardized test scores and a couple of other miscellaneous numerical factors. How do I go about this? [more inside]

## Help me calculate a hidden value in my data

I've spent the past day or so trying to figure out how to calculate a hidden value in my data. It varies linearly with time, or closely enough that we can make that assumption within any given dataset. Where this goes beyond a simple linear regression is that each datapoint is known to be above or below the hidden value. The data is collected in a C# program and processed in Excel; an Excel function would be the ideal solution. [more inside]

## Factor of Covariate

I'm trying to run an ordinal regression in SPSS. Are my independent variables factors or covariates? [more inside]

## Statistics: Regression

Statisticsfilter: I need help figuring out how to pound a regression model into submission. [more inside]

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