Which of the following test is used to find out whether the observed data differ significantly from the one obtained from theoretical distribution?
Correct answer: C. Chi-square test
- A. Student's t-test
- B. F-test
- C. Chi-square test
- D. Standard deviation
Explanation
The chi-square (χ²) test is a statistical hypothesis test used to determine if there is a significant difference between the expected frequencies and the observed frequencies in one or more categories. It is a "goodness-of-fit" test.
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Analytical chemistry identifies and measures substances using separation and instrumental methods. Chromatography is studied through stationary and mobile phases, retention and Rf values, while spectroscopy connects absorption of electromagnetic radiation with molecular structure and supports qualitative and quantitative analysis through techniques such as UV-visible and infrared spectroscopy.
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