3. A chemist used two different methods to measure the number of mg of Fe in five iron(II) sulfate supplement tablets. The results of each are shown below. 61.55mg 67.15mg Method 1: 65.03mg 64.71mg 64.9 mg 65.1 mg Method 2: 65.5 mg 66.1mg Calculate the average amount determined by each method as well as the standard deviation and RSD for each method. Which method gave more precise results? How do you know? Is it possible to know which method is more accurate? Why or why not? 63.07mg 65.4mg
3. A chemist used two different methods to measure the number of mg of Fe in five iron(II) sulfate supplement tablets. The results of each are shown below. 61.55mg 67.15mg Method 1: 65.03mg 64.71mg 64.9 mg 65.1 mg Method 2: 65.5 mg 66.1mg Calculate the average amount determined by each method as well as the standard deviation and RSD for each method. Which method gave more precise results? How do you know? Is it possible to know which method is more accurate? Why or why not? 63.07mg 65.4mg
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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Transcribed Image Text:3. A chemist used two different methods to measure the number of mg of Fe in five iron(II) sulfate
supplement tablets. The results of each are shown below.
64.71mg
Method 1: 65.03mg
61.55mg
64.9 mg
65.1 mg
Method 2: 65.5 mg
66.1mg
Calculate the average amount determined by each method as well as the standard deviation and
RSD for each method.
63.07mg
65.4mg
67.15mg
Which method gave more precise results? How do you know?
Is it possible to know which method is more accurate? Why or why not?
Expert Solution
Step 1
Average or mean value is simply calculated as the ratio of sum of all the numbers to the total number of all the mathematical values.
Standard deviation is a tool or a measure that shows that how much variation exists between the given value and the mean or the average value.
RSD is relative standard deviation that tells how the different numbers in a particular data set are scattered around the mean.
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