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4. A new procedure for the determination of sulfur in coal was tested on a standard coal sample with a  certified value of 2.14% sulfur by mass. The new procedure gave results of 2.11%, 2.07%, 2.04%,  2.06%, and 2.16% for five separate determinations.  a) Does the new procedure give the correct result at the 95% confidence level?  b) Does the new procedure give the correct result at the 90% confidence level?

4. A new procedure for the determination of sulfur in coal was tested on a standard coal sample with a  certified value of 2.14% sulfur by mass. The new procedure gave results of 2.11%, 2.07%, 2.04%,  2.06%, and 2.16% for five separate determinations.  a) Does the new procedure give the correct result at the 95% confidence level?  b) Does the new procedure give the correct result at the 90% confidence 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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4. A new procedure for the determination of sulfur in coal was tested on a standard coal sample with a 
certified value of 2.14% sulfur by mass. The new procedure gave results of 2.11%, 2.07%, 2.04%, 
2.06%, and 2.16% for five separate determinations. 


a) Does the new procedure give the correct result at the 95% confidence level? 


b) Does the new procedure give the correct result at the 90% confidence level? 

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