Answered: AA (mg/g) UV (ug/ml) Sample (ug/ml)…

AA (mg/g) UV (ug/ml) Sample (ug/ml) Unknown Fe solution 1 Unknown Fe solution _2 0.322 8.136 0.318 7.967 Unknown Fe solution_3 0.32 8.339 Mean Standard deviation 95% Confidence limit (use t=4.3)

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.16QAP

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Question

100%

calculate mean,SD and 95%confidence limit. Use t=4.3.Compare the two means using the student's t test and precision of the two methods using F test at 95% confidence level . For two sets of three replicates use t=2.78 and fcrit=19

AA (mg/g)
UV (ug/ml)
Sample (ug/ml)
Unknown Fe solution 1
Unknown Fe solution _2
0.322
8.136
0.318
7.967
Unknown Fe solution_3
0.32
8.339
Mean
Standard deviation
95% Confidence limit (use
t=4.3)
AA (mg/g)
Fertiliser (mg/ml)
Fertiliser solution 1
Fertiliser solution_2
Fertiliser solution_3
UV (ug/ml)
0.592
7.763
0.644
7.695
0.577
7.661
Mean
Standard deviation
95% Confidence limit (use
t=4.3)

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