ẩjthe resultẩthẩẩthree individual analyses, determine the mean % Cu, the standard deviation in the mean (%), the 95% confidence limit (%), and the relative confidence limit (ppt). See sections 4.2-4.4 in Harris if these are not familiar. Relevant equations for statistics are posted in “Stats and Fror Analysis" under General Information in Brightspace
ẩjthe resultẩthẩẩthree individual analyses, determine the mean % Cu, the standard deviation in the mean (%), the 95% confidence limit (%), and the relative confidence limit (ppt). See sections 4.2-4.4 in Harris if these are not familiar. Relevant equations for statistics are posted in “Stats and Fror Analysis" under General Information in Brightspace
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
solve for number 7 and the second table
the value of 95% in the t table is 4.30
Transcribed Image Text:8. Complete the summary table below.
Unknown Brass Samples - Summary Table
Sample #
1
0.1706
0.1603
0.1539
Mass of sample (g)
Mean absorbance of diluted
0.340
0.320
0.308
sample (from AA)
Concentration of Cu in diluted
sample (ppm)
Concentration of Cu in brass stock
solution (ppm)
4.579
4.296
4.126
228.95
214.8
206.3
6.710
6.610
6.702
% Cu in brass
Mean % Cu in Brass
6.674
Standard Deviation in the mean % Cu
Confidence limit for the % Cu
Relative confidence limit for the % Cu
ppt
95% confidence interval for the true % Cu
%
9. List sources of error for this experiment, including tolerances for all volumetric glassware and
instruments used.
Transcribed Image Text:7. Using the results of the three individual analyses, determine the mean % Cu, the standard deviation
in the mean (%), the 95% confidence limit (%), and the relative confidence limit (ppt). See sections
4.2-4.4 in Harris if these are not familiar. Relevant equations for statistics are posted in “Stats and
Error Analysis" under General Information in Brightspace.
Conc.Of Cu В %3 214.8ppт
Conc.Of Cu С - 206.3pрт
Mass of copper B = 214.8ppm × 0.051 = 10.74mg
Mass of copper C %3D 206.3pрт X 0.051 — 10.315
Mass % B
6.69993 = 6.610%
Mass % C = 6.702%
6.710% + 6.610% + 6.702%
Mean % of Cu
= 6.674%
3
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