How can any lab compare the results of Inter Lab Comparison in context of Quality Assurance (ISO 17025), if the test result is qualitative in nature?

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Can you recommend provider Intermediate laboratory test for hydrocarbon, polyethylene & polypropylene?

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What are the challenges or short falls with the ISO 45001?

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Can a paper that is posted as a preprint in a database with DOI, can be reviewed in another journal and accepted for publication??

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Karen A. Darbinyan

Hello, for the comparison of the two methods let start with T-test.

https://en.wikipedia.org/wiki/Student%27s_t-test

Giooid luck!

Muhammad Waseem Akram

For Qualitative you can choose Chi-Square

Rawaa G Abdullah

Igree with Doctor https://www.researchgate.net/profile/Karen_Darbiny .