Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Tutorial (Accuracy, Precision and Errors) with answer
Description: For university students.
Description: For university students.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
BIO 2134 Tutorial (Accuracy and Precision)
1
...
If your measurements are consistently close to each other but differ significantly from the
known concentration of the protein, would you say your results are more accurate or more
precise? Explain why and discuss how you would improve the situation
...
Precision refers to how close
the measurements are to each other, while accuracy refers to how close they are to the true
value
...
2
...
Discuss whether this scenario highlights an issue of
accuracy or precision and suggest possible reasons for the discrepancies
...
The variation suggests a lack of consistency in the
measurements
...
g
...
Standardizing procedures and regular
calibration of equipment could improve precision
...
You are testing a new diagnostic method that produces results which are consistently 10%
higher than the known values, even though repeated measurements of the same sample
yield nearly identical results
...
What steps would you take to address the issue?
The method demonstrates high precision (because the repeated measurements are nearly
identical), but low accuracy (because the results are consistently 10% higher than the true values)
...
To address this, one would need to
investigate the calibration of the instruments, the reagents used, or the experimental setup to
identify and correct the source of the systematic bias
...
A biotechnology company is evaluating the performance of two different analytical
methods for detecting a biomarker in blood samples
...
Method B gives highly consistent results but is often far from the true value
...
(ii)
Method B is more precise because its results are consistent, but it lacks accuracy as
the results are far from the true value
...
Improving
the precision of Method A (e
...
, by controlling environmental factors or standardizing
procedures) could make it more reliable for routine clinical use
...
A researcher notices that their results are both highly precise and highly accurate when
working in the morning but become more variable and less accurate when working in the
afternoon
...
The change in performance could be due to factors such as:
Environmental changes: Temperature or humidity may fluctuate throughout the day,
impacting the accuracy and precision of instruments
...
Instrument drift: Some instruments may become less reliable after prolonged use without
recalibration
...
6
...
How would you diagnose
the presence of random and systematic errors in these experiments?
The slight variations in amplification from the same machine suggest random errors, likely
due to factors such as minor fluctuations in reagent concentrations, pipetting
inconsistencies, or slight temperature variations during the reaction
...
To diagnose these errors:
For random errors, increasing the number of trials and averaging the results can help
mitigate the fluctuations
...
3
Title: Tutorial (Accuracy, Precision and Errors) with answer
Description: For university students.
Description: For university students.