PHCH 667 Exam Correctly Solved
The predictive value for a positive Qualitative Test is best describes as:
A. Both answers are correct
B. PPV = TP/(TP+FP) - the number of a true positive values divided by all
observed positive values
C. NPV = TN/(TN+FN) - the number of true negative values divided by all
observed negative values - ✅✅ B
There are two kindergarten classes from different parts of a city in which five boys
(5 years of age) were randomly selected to see how their weights compared to the
national average of boys this age, which is 41 pounds. Below are the data for the
selective five boys from each of the two classes:
Class 1: 34, 38, 52, 42 and 34 pounds
Class 2: 40, 44, 40, 38 and 38 pounds
Which class provides a more precise representation of the weight of this class of 5
year old boys?
A. Class 1
B. Class 2
C. They are equally accurate - ✅✅ B
For a Qualitative Test, sensitivity is determined by:
A. TP/(TP+FP) - the number of true positives divided by all positive results seen
by the test
B. TP/(TP+FN) - the number of true positives divided by all results that should
have been positive - ✅✅ B
,Precision is best represented by which of the following?
A. Variance
B. Standard deviation
C. Mean (average)
D. Gaussian distribution - ✅✅ B
Predictive value for a negative Qualitative Test is best described as:
A. Both answers are correct
B. PPV = TP/(TP+FP) - the number of a true positive values divided by all
observed positive values
C. NPV = TN/(TN+FN) - the number of true negative values divided by all
observed negative values - ✅✅ C
Accuracy is best represented by which of the following?
A. Standard deviation
B. Variance
C. Gaussian distribution
D. Mean (average) - ✅✅ D
For a Qualitative Test, specificity is determined by?
A. TN/(TN+FP) - the number of true negatives divided by all results that should
have been negative
B. TN/(TP+FN) - the number of true negatives divided by all the true positive and
negative values - ✅✅ A
, There are two kindergarten classes from different parts of a city in which five boys
(5 years of age) were randomly selected to see how their weights compared to the
national average of boys this age, which is 41 pounds. Below are the data for the
selective five boys from each of the two classes:
Class 1: 34, 38, 52, 42 and 34 pounds
Class 2: 40, 44, 40, 38 and 38 pounds
Which class provides a more accurate representation of the weight of this class of 5
year old boys?
A. Class 1
B. Class 2
C. They are equally accurate - ✅✅ B
Which is the correct definition of international unit for enzyme activity?
A. Amount of enzyme that catalyzes the conversion of one kilogram of substrate in
1h
B. Amount of enzyme that catalyzes the conversion of one micromole of substrate
in 1 minute
C. Amount of enzyme that catalyzes the conversion of one micromole of substrate
in 1 h
D. Amount of enzyme that catalyzes the conversion of one milligram of substrate
in 1 minute - ✅✅ B
What analytes are separated on agarose gel and SDS-PAGE, respectively?
A. Lipids and protein
B. Proteins and DNA
C. DNA and RNA
D. DNA and protein - ✅✅ D
The predictive value for a positive Qualitative Test is best describes as:
A. Both answers are correct
B. PPV = TP/(TP+FP) - the number of a true positive values divided by all
observed positive values
C. NPV = TN/(TN+FN) - the number of true negative values divided by all
observed negative values - ✅✅ B
There are two kindergarten classes from different parts of a city in which five boys
(5 years of age) were randomly selected to see how their weights compared to the
national average of boys this age, which is 41 pounds. Below are the data for the
selective five boys from each of the two classes:
Class 1: 34, 38, 52, 42 and 34 pounds
Class 2: 40, 44, 40, 38 and 38 pounds
Which class provides a more precise representation of the weight of this class of 5
year old boys?
A. Class 1
B. Class 2
C. They are equally accurate - ✅✅ B
For a Qualitative Test, sensitivity is determined by:
A. TP/(TP+FP) - the number of true positives divided by all positive results seen
by the test
B. TP/(TP+FN) - the number of true positives divided by all results that should
have been positive - ✅✅ B
,Precision is best represented by which of the following?
A. Variance
B. Standard deviation
C. Mean (average)
D. Gaussian distribution - ✅✅ B
Predictive value for a negative Qualitative Test is best described as:
A. Both answers are correct
B. PPV = TP/(TP+FP) - the number of a true positive values divided by all
observed positive values
C. NPV = TN/(TN+FN) - the number of true negative values divided by all
observed negative values - ✅✅ C
Accuracy is best represented by which of the following?
A. Standard deviation
B. Variance
C. Gaussian distribution
D. Mean (average) - ✅✅ D
For a Qualitative Test, specificity is determined by?
A. TN/(TN+FP) - the number of true negatives divided by all results that should
have been negative
B. TN/(TP+FN) - the number of true negatives divided by all the true positive and
negative values - ✅✅ A
, There are two kindergarten classes from different parts of a city in which five boys
(5 years of age) were randomly selected to see how their weights compared to the
national average of boys this age, which is 41 pounds. Below are the data for the
selective five boys from each of the two classes:
Class 1: 34, 38, 52, 42 and 34 pounds
Class 2: 40, 44, 40, 38 and 38 pounds
Which class provides a more accurate representation of the weight of this class of 5
year old boys?
A. Class 1
B. Class 2
C. They are equally accurate - ✅✅ B
Which is the correct definition of international unit for enzyme activity?
A. Amount of enzyme that catalyzes the conversion of one kilogram of substrate in
1h
B. Amount of enzyme that catalyzes the conversion of one micromole of substrate
in 1 minute
C. Amount of enzyme that catalyzes the conversion of one micromole of substrate
in 1 h
D. Amount of enzyme that catalyzes the conversion of one milligram of substrate
in 1 minute - ✅✅ B
What analytes are separated on agarose gel and SDS-PAGE, respectively?
A. Lipids and protein
B. Proteins and DNA
C. DNA and RNA
D. DNA and protein - ✅✅ D
