The rare earth element gadolinium is often used as a contrasting agent for MRIs. The concentration of gadolinium was measured in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.549 ppm, 1.548 ppm, 1.532 ppm, 1.535 ppm, 2.107 ppm, 1.538 ppm, 1.549 ppm, 1.539 ppm. Use the Grubbs test to determine if one of these values is an outlier. What is the value of Gcalc? Gcale = Based on the outcome of the Grubbs test, calculate the mean (x), standard deviation (s), and 99% confidence interval for the results. A list of t values can be found in the Student's t table. x = confidence interval: X+ Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be rejected. O The potential outlier should be kept. ppm S= ppm ppm

Chemistry: The Molecular Science
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ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section13.6: Expressing Solution Composition
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The rare earth element gadolinium is often used as a contrasting agent for MRIs. The concentration of gadolinium was measured
in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.549 ppm,
1.548 ppm, 1.532 ppm, 1.535 ppm, 2.107 ppm, 1.538 ppm, 1.549 ppm, 1.539 ppm.
Use the Grubbs test to determine if one of these values is an outlier. What is the value of Geale?
Gcalc =
Based on the outcome of the Grubbs test, calculate the mean (x), standard deviation (s), and 99% confidence interval for
the results. A list of t values can be found in the Student's t table.
x =
confidence interval: X+
Should this potential outlier be rejected with 95%
confidence? Critical values of G can be found in
this table.
The potential outlier should be rejected.
O The potential outlier should be kept.
ppm
S =
ppm
ppm
Transcribed Image Text:The rare earth element gadolinium is often used as a contrasting agent for MRIs. The concentration of gadolinium was measured in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.549 ppm, 1.548 ppm, 1.532 ppm, 1.535 ppm, 2.107 ppm, 1.538 ppm, 1.549 ppm, 1.539 ppm. Use the Grubbs test to determine if one of these values is an outlier. What is the value of Geale? Gcalc = Based on the outcome of the Grubbs test, calculate the mean (x), standard deviation (s), and 99% confidence interval for the results. A list of t values can be found in the Student's t table. x = confidence interval: X+ Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be rejected. O The potential outlier should be kept. ppm S = ppm ppm
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