A researcher has developed a new analytical method to determine the percent by mass on in solids. To test the new method, the researcher purchases a standard reference naterial sample that is 2.85% iron by mass. Analysis of the iron standard returns values of 2.75%, 2.89%, 2.77%, 2.81%, and 2.87%. Are the results of the new method significantly lifferent from the standard reference sample? (Hint: Use Confidence Interval)

Chemistry
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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
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A researcher has developed a new analytical method to determine the percent by mass
iron in solids. To test the new method, the researcher purchases a standard reference
material sample that is 2.85% iron by mass. Analysis of the iron standard returns values of
2.75%, 2.89%, 2.77%, 2.81%, and 2.87%. Are the results of the new method significantly
different from the standard reference sample? (Hint: Use Confidence Interval)
Transcribed Image Text:A researcher has developed a new analytical method to determine the percent by mass iron in solids. To test the new method, the researcher purchases a standard reference material sample that is 2.85% iron by mass. Analysis of the iron standard returns values of 2.75%, 2.89%, 2.77%, 2.81%, and 2.87%. Are the results of the new method significantly different from the standard reference sample? (Hint: Use Confidence Interval)
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