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Results tagged with experiment-design
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user 76484
The study of how to structure an information-gathering exercise where variation is present.
4
votes
Recommended books on experiment design?
I have recently reviewed a large collection of DoE books (17), with the following requirements:
Not a cookbook approach but geared towards understanding (hard requirement)
Decently in-depth (hard req …
1
vote
Sample Size Calculation considering Gradual Improvements to Treatment Group
Partial Answer:
Well, you definitely have a confounding variable: machine performance. Let $M$ be machine performance, $T$ the treatment, and $Y$ the outcome. Then you have a causal diagram as follow …
- 6,039
1
vote
Accepted
Do confounder variables need to have a causal effect on treatment AND response variables?
Weather certainly affects amount of sweat, and it would be wise to include it in your analysis! A confounding variable is a variable that sets up a backdoor path. Since weather does not set up a backd …
- 6,039
1
vote
1
answer
181
views
Experimental Design: Choose Data Points to Minimize Quadratic Term Variance in Multiple Regr...
$\newcommand{\eps}{\varepsilon}\newcommand{\szdp}[1]{\!\left(#1\right)}
\newcommand{\szdb}[1]{\!\left[#1\right]}$
Problem Statement: Suppose that you wish to fit a model
$$Y=\beta_0+\beta_1x+\beta_2x^ …
- 6,039
0
votes
1
answer
167
views
Unbiased Estimator for Mean Response to Treatment
$\newcommand{\eps}{\varepsilon}\newcommand{\szdp}[1]{\!\left(#1\right)}$
Problem Statement: Consider the following model for the responses measured in a randomized block design containing $b$ blocks a …
- 6,039
5
votes
What does the phrase "adjusted by" mean?
"Adjusted by" or "conditioned on" is a phrase that can mean many different things, depending on the context. The New Causal Revolution, led by Judea Pearl and Donald Rubin, provides the best context f …
- 6,039