HLTH 501 BIOSTATISTICS
QUESTIONSBANK 2025|26
HLTH 501 BIOSTATISTICS QUESTIONSBANK 2025|26 WITH
GUARANTEED ACCURATE ANSWERS |LATEST VERSION
Point prevalence (PP) - ACCURATE ANSWERS✔✔ =number of
persons with disease/number of persons examined at baseline
Risk difference (RD) - ACCURATE ANSWERS✔✔ =PPexposed-
PPunexposed;
CIexposed-CIunexposed;
IRexposed-IRunexposed
Cumulative Incidence (CI) - ACCURATE ANSWERS✔✔ =number of
persons who develop disease during a specified period/number of
persons at risk at baseline
,Population Attributable Risk (PAR) - ACCURATE ANSWERS✔✔
=PPoverall-PPunexposed/PPoverall;
CIoverall-CIunexposed/CIoverall;
IRoverall-IRunexposed/IRoverall
Odds ratio (OR) - ACCURATE ANSWERS✔✔ =PPexposed/(1-
PPexposed)//PPunexposed/(1-PPunexposed);
CIexposed/(1-CIexposed)//CIunexposed/(1-CIunexposed)
relative risk (RR) - ACCURATE ANSWERS✔✔
=PPexposed/PPunexposed;
CIexposed/CIunexposed
incidence rate (IR) - ACCURATE ANSWERS✔✔ =number of persons
who develop disease during a specified period/sum of the length of time
during which persons are disease free
Standard deviation (s) - ACCURATE ANSWERS✔✔
mean (x) - ACCURATE ANSWERS✔✔
,median for odd - ACCURATE ANSWERS✔✔
The best numerical summaries for dichotomous, ordinal, and categorical
variables are relative frequencies. - ACCURATE ANSWERS✔✔ True
Two types of medical devices used for knee replacement are being
studied to see if the type of knee replacement used affects the rate of
infection for a specific bacterial infection. The infection rate for a
specific bacterial infection after surgery for device A is 0.0043. The rate
for the same bacterial infection is 0.0121 for device B. How does the
risk of developing the bacterial infection in individuals using device B
compare to the risk of developing the bacterial infection in individuals
using device A? - ACCURATE ANSWERS✔✔ Individuals using device
B are 2.814 times more likely to develop the bacterial infection of
interest than individuals using device A.
Confounding is usually a major issue in cohort studies. - ACCURATE
ANSWERS✔✔ True
The population attributable risk is usually expressed as a percentage and
ranges from 0% to 100%. - ACCURATE ANSWERS✔✔ True
The Cumulative incidence is computed as the number of persons who
develop a disease during a specified period over the number of persons
examined at baseline - ACCURATE ANSWERS✔✔ False
, A nested case-control study is a specific type of case-control study that
is usually designed from a cohort study. - ACCURATE ANSWERS✔✔
True
A design that is a very detailed report of the specific features of a
particular participant or case is known as? - ACCURATE
ANSWERS✔✔ Case report
Calculate the mean blood glucose level for a study measuring the blood
glucose levels of 10 individuals whose blood glucose readings were as
follows: 88, 97, 101, 104, 104, 107, 109, 117, 121, and 147. -
ACCURATE ANSWERS✔✔ 109.5
Which type of study design can assess temporal relationship? -
ACCURATE ANSWERS✔✔ A cohort study
In a study, some patients were not followed for a total of 10 years. Some
suffered events (i.e., developed coronary artery disease during follow-
up), whereas others dropped out of the study. The following table
displays the total number of person-years of follow-up in each group.
Number with Coronary Artery Disease
Total Follow-Up (years)
QUESTIONSBANK 2025|26
HLTH 501 BIOSTATISTICS QUESTIONSBANK 2025|26 WITH
GUARANTEED ACCURATE ANSWERS |LATEST VERSION
Point prevalence (PP) - ACCURATE ANSWERS✔✔ =number of
persons with disease/number of persons examined at baseline
Risk difference (RD) - ACCURATE ANSWERS✔✔ =PPexposed-
PPunexposed;
CIexposed-CIunexposed;
IRexposed-IRunexposed
Cumulative Incidence (CI) - ACCURATE ANSWERS✔✔ =number of
persons who develop disease during a specified period/number of
persons at risk at baseline
,Population Attributable Risk (PAR) - ACCURATE ANSWERS✔✔
=PPoverall-PPunexposed/PPoverall;
CIoverall-CIunexposed/CIoverall;
IRoverall-IRunexposed/IRoverall
Odds ratio (OR) - ACCURATE ANSWERS✔✔ =PPexposed/(1-
PPexposed)//PPunexposed/(1-PPunexposed);
CIexposed/(1-CIexposed)//CIunexposed/(1-CIunexposed)
relative risk (RR) - ACCURATE ANSWERS✔✔
=PPexposed/PPunexposed;
CIexposed/CIunexposed
incidence rate (IR) - ACCURATE ANSWERS✔✔ =number of persons
who develop disease during a specified period/sum of the length of time
during which persons are disease free
Standard deviation (s) - ACCURATE ANSWERS✔✔
mean (x) - ACCURATE ANSWERS✔✔
,median for odd - ACCURATE ANSWERS✔✔
The best numerical summaries for dichotomous, ordinal, and categorical
variables are relative frequencies. - ACCURATE ANSWERS✔✔ True
Two types of medical devices used for knee replacement are being
studied to see if the type of knee replacement used affects the rate of
infection for a specific bacterial infection. The infection rate for a
specific bacterial infection after surgery for device A is 0.0043. The rate
for the same bacterial infection is 0.0121 for device B. How does the
risk of developing the bacterial infection in individuals using device B
compare to the risk of developing the bacterial infection in individuals
using device A? - ACCURATE ANSWERS✔✔ Individuals using device
B are 2.814 times more likely to develop the bacterial infection of
interest than individuals using device A.
Confounding is usually a major issue in cohort studies. - ACCURATE
ANSWERS✔✔ True
The population attributable risk is usually expressed as a percentage and
ranges from 0% to 100%. - ACCURATE ANSWERS✔✔ True
The Cumulative incidence is computed as the number of persons who
develop a disease during a specified period over the number of persons
examined at baseline - ACCURATE ANSWERS✔✔ False
, A nested case-control study is a specific type of case-control study that
is usually designed from a cohort study. - ACCURATE ANSWERS✔✔
True
A design that is a very detailed report of the specific features of a
particular participant or case is known as? - ACCURATE
ANSWERS✔✔ Case report
Calculate the mean blood glucose level for a study measuring the blood
glucose levels of 10 individuals whose blood glucose readings were as
follows: 88, 97, 101, 104, 104, 107, 109, 117, 121, and 147. -
ACCURATE ANSWERS✔✔ 109.5
Which type of study design can assess temporal relationship? -
ACCURATE ANSWERS✔✔ A cohort study
In a study, some patients were not followed for a total of 10 years. Some
suffered events (i.e., developed coronary artery disease during follow-
up), whereas others dropped out of the study. The following table
displays the total number of person-years of follow-up in each group.
Number with Coronary Artery Disease
Total Follow-Up (years)
