Three different analytical methods are compared for determining Ca in a biological sample. The laboratory is interested in knowing whether the methods differ. The results shown below represent Ca results in ppm determined by an ion-selective electrode (ISE) method, by EDTA titration, and by atomic absorption spectrometry: (show solutions) a. State the null and alternative hypotheses. b. Determine whether there are differences in the three methods at the 95% and 99% confidence levels. c. If a difference was found at the 95% confidence level, determine which methods differ from each other.
Three different analytical methods are compared for determining Ca in a biological sample. The laboratory is interested in knowing whether the methods differ. The results shown below represent Ca results in ppm determined by an ion-selective electrode (ISE) method, by EDTA titration, and by atomic absorption spectrometry: (show solutions) a. State the null and alternative hypotheses. b. Determine whether there are differences in the three methods at the 95% and 99% confidence levels. c. If a difference was found at the 95% confidence level, determine which methods differ from each other.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Three different analytical methods are compared for determining Ca in a biological sample. The laboratory is interested in knowing whether the methods differ. The results shown below represent Ca results in ppm determined by an ion-selective electrode (ISE) method, by EDTA titration, and by atomic absorption spectrometry: (show solutions)
a. State the null and alternative hypotheses.
b. Determine whether there are differences in the three methods at the 95% and 99% confidence levels.
c. If a difference was found at the 95% confidence level, determine which methods differ from each other.
Transcribed Image Text:EDTA
Atomic
Repetition No.
ISE
Titration
Absorption
39.2
29.9
44.0
32.8
28.7
49.2
3
41.8
21.7
35.1
4
35.3
34.0
39.7
5
33.5
39.2
45.9
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