All Questions
Tagged with mathematica regression
7 questions
1
vote
1
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524
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Residuals not normal due to random effects structure
I am new to mixed-effect models and statistics, and I need to do a project for my thesis using mixed-effect modeling techniques.
My research aims to model how cardiovascular risk scores change over ...
- 11
0
votes
1
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59
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How to produce synthetic (fake) data knowing the correct fit parameters?
For cross-checking purposes, if I want to check that a NonlinearModelFit performed in Mathematica is producing the correct standard errors, I would need to produce simulated data based on the fitted ...
- 25
2
votes
1
answer
417
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Linear Regression Coefficient Interpretation [closed]
I have a regression problem: regress y on x1 x2
y: Sales revenue, x1: is_holiday (dummy variable), x2: another continuous variable (note that this is just the ...
- 21
2
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0
answers
1k
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How can I compute the lower and upper bounds of a confidence interval in a linear regression problem?
I am completing a university statistics assignment on the Mathematica program, and this is the initial question:
"The Medical Research Council wanted to evaluate the
effects of different dosages of a ...
- 21
2
votes
1
answer
4k
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Best multivariate polynomial regression
I have a dataset (x,y) where x is a n-dimensional vector and y is an m-dimensional vector. (m=3, n>2) My goal is to find the best polynomial in x fitting the (x,y) dataset.
The dimension of x is ...
- 267
3
votes
1
answer
2k
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How to calculate confidence and prediction bands for a linear regression using Mathematica?
I need to calculate confidence and prediction bands for a linear regression that is in the general form of $y=ax$, where $a$ is the multiplier and $x$ the variable.
I found a code in
http://...
- 505
1
vote
1
answer
1k
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Normalizing error variance scale
Imagine we have two sets of data m1 and m2. m1 components have the dimension of [m^2/s] and m2 components are measured in [cm^2/s].
e.g.
...
- 505