How can I analyze soil samples for vanadium content using two different methods?

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Homework Help Overview

The discussion revolves around analyzing soil samples for vanadium content using two different methods, with participants exploring statistical comparisons of the results obtained from each method.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need to calculate means and standard deviations for both methods and consider using a t-test for comparison. There is uncertainty about the appropriate formulas and methods to apply.

Discussion Status

Some participants have offered guidance on searching for relevant statistical methods, while others express confusion and seek further clarification on the topic. The discussion reflects a mix of attempts to understand statistical concepts and the specific requirements of the assignment.

Contextual Notes

Participants mention constraints such as missing class due to illness and the pressure to complete the assignment without comprehensive notes. The context involves an analytical chemistry class with a focus on statistical analysis.

oxshannon
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Homework Statement


The following data were obtained for the analysis of soil for vanadium content in mg/g using two different methods. Do the two methods yield essentially the same results?

Method 1 Method 2
26.30 26.22
26.43 26.32
26.28 26.20
26.19 26.11
26.49 26.42

Homework Equations


I'm thinking I find the mean and standard deviation of each, find spooled and from there I'm not sure. So I know those 2 formulas, but I;m not sure on any others..

The Attempt at a Solution


Didn't attempt because I kind of need a push in the right direction, not someone to do out the problem..
 
Last edited:
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FYI, I have moved your 2 recent statistics questions to "Precalculus Mathematics".

Looks like a t-test is needed here. There should be something in your textbook or class notes about comparing two sample means.

p.s. welcome to Physics Forums.
 
thank you!
i can't really find anything in my textbook, and the only reason I am unsure on how to do this is because i was really sick for the class so i didnt get to go, but I am still required to pass the assignment in, so I am legit lost :(
 
When you know the right search terms, Google gives a lot of hits:

http://www.google.com/#hl=en&sugexp...pw.r_cp.&fp=93057ccd64abdef9&biw=1280&bih=678

Or check this wikipedia page; scroll down to the section titled "Independent two-sample t-test":
http://en.wikipedia.org/wiki/Student's_t-test#Independent_one-sample_t-test

By the way, it's a good idea to ask a classmate if you could copy their class notes whenever you have to miss a class.

EDIT: out of curiosity, is this a statistics or a chemistry class (or something else)?
 
Last edited:
Thanks a lot!

It was the second day of classes (terrible time to come down with the flu), and I don't know anyone in the class, the professor just e-mailed me the assignment and still wants me to hand it in on time without notes. That's another story though.

It's an analytical chemistry class, so I guess the introduction is mainly statistics (which I never took, so I'm even more lost). It's a terrible situation really.

EDIT: That wikipedia link looks perfect for what I have to do.. thanks a lot! Also, any idea on the other question I posted? :-)
 

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