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3. You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter. You obtained a solution with a known pH of 5.5. You performed 10 replicate measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below. From the following data a. Calculate for the mean, standard deviation, and percent error for the data set A, B and C. b. Apply Q-test and Grubb's Test to determine if the extreme values are outliers. c. State the null and alternative hypotheses. d. Use MS Excel or Google sheets to determine if there is statistically significant difference between the three methods at 95% confident level.

3. You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter. You obtained a solution with a known pH of 5.5. You performed 10 replicate measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below. From the following data a. Calculate for the mean, standard deviation, and percent error for the data set A, B and C. b. Apply Q-test and Grubb's Test to determine if the extreme values are outliers. c. State the null and alternative hypotheses. d. Use MS Excel or Google sheets to determine if there is statistically significant difference between the three methods at 95% confident level.

Chemistry
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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3. You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter. You obtained a solution with a known pH of 5.5. You performed 10 replicate measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below. From the following data a. Calculate for the mean, standard deviation, and percent error for the data set A, B and C. b. Apply Q-test and Grubb's Test to determine if the extreme values are outliers. c. State the null and alternative hypotheses. d. Use MS Excel or Google sheets to determine if there is statistically significant difference between the three methods at 95% confident level.
Transcribed Image Text:3. You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter. You obtained a solution with a known pH of 5.5. You performed 10 replicate measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below. From the following data a. Calculate for the mean, standard deviation, and percent error for the data set A, B and C. b. Apply Q-test and Grubb's Test to determine if the extreme values are outliers. c. State the null and alternative hypotheses. d. Use MS Excel or Google sheets to determine if there is statistically significant difference between the three methods at 95% confident level.
pH pH pH meter meter meter Brand A Brand B Brand C 5.6 5.5 5.8 5.8 5.6 5.9 5.6 5.5 6.0 5.5 5.6 5.9 5.6 5.6 5.3 5.7 5.6 5.6 5.6 5.4 5.7 5.7 5.5 5.8 5.1 5.5 5.9 5.6 5.4 5.1
Transcribed Image Text:pH pH pH meter meter meter Brand A Brand B Brand C 5.6 5.5 5.8 5.8 5.6 5.9 5.6 5.5 6.0 5.5 5.6 5.9 5.6 5.6 5.3 5.7 5.6 5.6 5.6 5.4 5.7 5.7 5.5 5.8 5.1 5.5 5.9 5.6 5.4 5.1
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