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23 Nov 2019

Quantitative Chemical Analysis (Daniel C. Harris) - 8thEdition
Problem 4-18:
If you measure a quantity four times and the standard deviation is1.0% of the average, can you be 90% confident that the true valueis within 1.2% of the measured average?

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what is therange in which you can be 95% confident that true

Can someone help me with question no 4 asap.

5. A. A new analytical extraction method was developed for a DNA analysis in finger print samples. A finger print sample was analyzed six times using the new protocol and found to contain average value of 7580.0 Î¼g/L with a standard deviation of 10 for DNA. A spike recovery was conducted to validate the accuracy of the new method. A spike of the blood with 150.0 Î¼g/L DNA gave a concentration of 7725 Î¼g/L.

A. What is the percentage recovery of DNA spike recovery study?

B. Based on the result of percentage recovery, will you consider the method accurate for DNA extraction?

C. Assuming the âreference valueâ of DNA in the samples, is there any significant difference between the result of the finger print analysis and the reference values at 99.9% confident interval?

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Quantitative Chemical Analysis (Daniel C. Harris) - 8thEdition
Problem 4-18:
If you measure a quantity four times and the standard deviation is1.0% of the average, can you be 90% confident that the true valueis within 1.2% of the measured average?

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Quantitative Chemical Analysis (Daniel C. Harris) - 8thEditionProblem 4-18:If you measure a quantity four times and the standard deviation is1.0% of the average, can you be 90% confident that the true valueis within 1.2% of the measured average?

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Principles of Chemistry Molecular Approach

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related questions

Weekly leaderboard

Quantitative Chemical Analysis (Daniel C. Harris) - 8thEdition
Problem 4-18:
If you measure a quantity four times and the standard deviation is1.0% of the average, can you be 90% confident that the true valueis within 1.2% of the measured average?