1,210 reputation
216
bio website andrew-christianson.github.io
location Los Angeles, CA
age 23
visits member for 2 years, 11 months
seen 2 days ago

Jun
19
comment Cutting cake into 5 equal pieces
@Steven if your read nothing else of this answer, note what Mark has to say in his final sentence. Absorbing this way of will be far more profitable for you in the long run than any direct answers to your questions.
Jun
19
answered What is the usefulness of matrices?
Jun
15
revised Perturbation problem
edited tags
Jun
15
revised Analyzing a mixture issue.
texifiy; clarify
Jun
15
suggested suggested edit on Analyzing a mixture issue.
Jun
15
answered Analyzing a mixture issue.
Jun
8
revised Most Probable Sum
formatting
Jun
8
suggested suggested edit on Most Probable Sum
Jun
8
comment Good in-depth books for precalc?
It's easier to help if you give us some idea of where you are currently. You've taken algebra and precalc, what do you remember and what do you want to review? You say the Everything Guide is not in-depth enough - what are your problems with it? Needs more step-by-step? Needs more proofs? Needs more examples? I'm not aware of a universally prescribed College Algebra book, so anything I or someone else recommend is based on your preferences.
Jun
8
comment Good in-depth books for precalc?
Perhaps you could give us a little bit of a better idea of where you think you are currently? I wouldn't want to insult you by offering too simplistic a book, nor stymy you by offering something too complicated. Looking over the outline for the Accuplacer test(collegeboard.com/student/testing/accuplacer/…), I see it covers everything from arithmetic through basic college algebra. Where do you think you fit on that spectrum, and which topics in particular do you feel confident or unsure about?
Jun
8
comment Multiple Regression over an experimental dataset
This might be better received over at stats.stackexchange.com . That said, we don't call it Multiple Linear Regression for nothing. Your data seems to oscillate significantly, at least based on the 3D Plot. If you could post a view of the data as a point cloud, it would be easier (for me at least) to visualize. Given how dispersed the data seems we wouldn't expect a linear model, even with an interaction term, to have a particularly high $R^2$. Where is this data drawn from?
Jun
8
revised Multiple Regression over an experimental dataset
Texify, include images
Jun
8
suggested suggested edit on Multiple Regression over an experimental dataset
Jun
5
revised Integral of$\int_0^1 x\sqrt{2- \sqrt{1-x^2}}dx$
changed integrals from inline to set off to improve legibility.
Jun
5
suggested suggested edit on Integral of$\int_0^1 x\sqrt{2- \sqrt{1-x^2}}dx$
Jun
5
comment Clearing a manufacturing backlog
To clarify, $X$ and $Y$ are the rates at which the eponymous stages process widgets, correct?
Jun
4
revised Function transformation
added latex
Jun
4
suggested suggested edit on Function transformation
Jun
4
comment Ratio and number theory
@Kartik. Ah. I didn't know it was an exam problem. Marvis' answer is definitely the better solution then
Jun
3
revised Convolution correct?
embed images