CHEM 103 LAB 3 ANALYTICAL CHEMISTRY
ENTRY QUANTITATIVE QUALITATIVE ANALYSIS
2026 COMPLETE QUESTIONS AND CORRECT
ANSWERS
◉ The true value of a population is estimated by this parameter
Answer: confidence interval
◉ This parameter is not a measure of precision: Answer: Mean
◉ A clinical technician has determined the concentration of thiol in
blood of a rheumatoid
arthritis patient in replicate measurements with the following
results (in mM): 2.81, 4.06, 3.62, 3.56,
3.27, 3.46, and 3.76. The technician will have this many degrees of
freedom in determining the
variance of these measurements Answer: Six ( n-1)
◉ The confidence interval shows a range of values that includes this
parameter of the
population with an ascribed degree of confidence Answer: Mean
,◉ In order to compare two means, one should perform this type of
significance test: Answer: t-Test
◉ In order to compare two variances, one should perform this type
of significance test: Answer: F-Test
◉ In a significance test, if the calculated value of the test parameter
exceeds its critical
value, then one should do this with the null hypothesis Answer:
Reject
◉ When a null hypothesis is accepted, it signifies that the observed
difference between the
compared values is due to this Answer: Random variation
◉ Which term describes the minimum detectable concentration of
an
analytical method: Answer: Detection limit
◉ An analysis involves several steps and operations which depend
on: Answer: 1- Problem
2- Expertise
3- Apparatus
,◉ General steps in Chemical Analysis Answer: 1- Formulate question
2- Select method
3- Sampling
4- Sample preparation
5- Analysis
6- Interpretation
7- Conclusion
◉ Yotta Answer: 10^24
◉ Zetta Answer: 10^21
◉ Exa Answer: 10^18
◉ Peta Answer: 10^15
◉ Tera Answer: 10^12
◉ Giga Answer: 10^9
◉ Mega Answer: 10^6
, ◉ Kilo Answer: 10^3
◉ Hecto Answer: 10^2
◉ Deca Answer: 10^1
◉ Deci Answer: 10^-1
◉ Centi Answer: 10^-2
◉ Milli Answer: 10^-3
◉ Micro Answer: 10^-6
◉ Nano Answer: 10^-9
◉ Pic Answer: 10^-12
◉ Femto Answer: 10^-15
◉ Atto Answer: 10^-18
ENTRY QUANTITATIVE QUALITATIVE ANALYSIS
2026 COMPLETE QUESTIONS AND CORRECT
ANSWERS
◉ The true value of a population is estimated by this parameter
Answer: confidence interval
◉ This parameter is not a measure of precision: Answer: Mean
◉ A clinical technician has determined the concentration of thiol in
blood of a rheumatoid
arthritis patient in replicate measurements with the following
results (in mM): 2.81, 4.06, 3.62, 3.56,
3.27, 3.46, and 3.76. The technician will have this many degrees of
freedom in determining the
variance of these measurements Answer: Six ( n-1)
◉ The confidence interval shows a range of values that includes this
parameter of the
population with an ascribed degree of confidence Answer: Mean
,◉ In order to compare two means, one should perform this type of
significance test: Answer: t-Test
◉ In order to compare two variances, one should perform this type
of significance test: Answer: F-Test
◉ In a significance test, if the calculated value of the test parameter
exceeds its critical
value, then one should do this with the null hypothesis Answer:
Reject
◉ When a null hypothesis is accepted, it signifies that the observed
difference between the
compared values is due to this Answer: Random variation
◉ Which term describes the minimum detectable concentration of
an
analytical method: Answer: Detection limit
◉ An analysis involves several steps and operations which depend
on: Answer: 1- Problem
2- Expertise
3- Apparatus
,◉ General steps in Chemical Analysis Answer: 1- Formulate question
2- Select method
3- Sampling
4- Sample preparation
5- Analysis
6- Interpretation
7- Conclusion
◉ Yotta Answer: 10^24
◉ Zetta Answer: 10^21
◉ Exa Answer: 10^18
◉ Peta Answer: 10^15
◉ Tera Answer: 10^12
◉ Giga Answer: 10^9
◉ Mega Answer: 10^6
, ◉ Kilo Answer: 10^3
◉ Hecto Answer: 10^2
◉ Deca Answer: 10^1
◉ Deci Answer: 10^-1
◉ Centi Answer: 10^-2
◉ Milli Answer: 10^-3
◉ Micro Answer: 10^-6
◉ Nano Answer: 10^-9
◉ Pic Answer: 10^-12
◉ Femto Answer: 10^-15
◉ Atto Answer: 10^-18
