Page 1 of 19
HS 4510: BIOSTATISTICS FINAL EXAM PREP
EXAM NEWEST
QUESTIONS AND CORRECT DETAILED
ANSWERS VERIFIED ANSWERS
Which of the following graphs can easily show variability and
dispersion of involved observations?
D
O
a. Pie Chart
N
b. Box Plot
O
c. Line Graph
T
C
d. Bar Plot - ✔✔✔ Correct Answer > b. Box Plot *
O
PY
To transform a raw score to a z score, you do not need the:
a. variance
b. standard deviation
c. mean
d. median - ✔✔✔ Correct Answer > d. median
,Page 2 of 19
You want to measure the level of patients' satisfaction with a set of
health services newly introduced to a community practice. You decided
to investigate that through a survey question with a 5point Likert-type
scale consisting of statements that measure level of satisfaction with the
health care service. The Likert scale ranged from 1 to 5; where 1=highly
satisfied, 2=satisfied, 3=cannot decide, 4= not satisfied, and 5=totally
not satisfied.
If you take the average of the scores for each question asked, in this
instance, you will be treating this variable as following upon which of
the following measurement scales?
D
O
a. categorical
N
O
b. ordinal
T
c. nominal
C
d. continuous - ✔✔✔ Correct Answer > d. continuous
O
PY
A research that investigated the association between a vegetarian diet
and body weight found an Odds Ratio of: 0.83 (95% confidence interval
0.50 - 1.80). Select the best statement that explains these findings:
a. The vegetarian diet is significantly associated with lower body
weight
b. The vegetarian diet is significantly associated with higher body
weight
, Page 3 of 19
c. The association between the vegetarian diet and body weight is a
chance finding
d. Those consuming the vegetarian diet are 17% (that is, 1 minus 0.83 in
%) more likely to have a lower body weight than those who do not -
✔✔✔ Correct Answer > c. The association between the vegetarian diet and
body weight is a chance finding *
A positive predictive value of a test is 0.34; this means that:
D
a. 34% of the time the measure tells us that there is a problem when
O
there is none
N
b. 66% of the time the measure tells us that there is a problem when
O
there is none
T
C
c. 66% of the time the measure tells us that there is no problem when
O
there is none
PY
d. none of the above - ✔✔✔ Correct Answer > b. 66% of the time the
measure tells us that there is a problem when there is none
In a geographical region, it was found that women were five times more
likely than men to be diagnosed with a serious illness. Although the
incidence rate was higher in females, the prevalence rate of the disease
was the same in both males and females. This can be explained by the
following:
HS 4510: BIOSTATISTICS FINAL EXAM PREP
EXAM NEWEST
QUESTIONS AND CORRECT DETAILED
ANSWERS VERIFIED ANSWERS
Which of the following graphs can easily show variability and
dispersion of involved observations?
D
O
a. Pie Chart
N
b. Box Plot
O
c. Line Graph
T
C
d. Bar Plot - ✔✔✔ Correct Answer > b. Box Plot *
O
PY
To transform a raw score to a z score, you do not need the:
a. variance
b. standard deviation
c. mean
d. median - ✔✔✔ Correct Answer > d. median
,Page 2 of 19
You want to measure the level of patients' satisfaction with a set of
health services newly introduced to a community practice. You decided
to investigate that through a survey question with a 5point Likert-type
scale consisting of statements that measure level of satisfaction with the
health care service. The Likert scale ranged from 1 to 5; where 1=highly
satisfied, 2=satisfied, 3=cannot decide, 4= not satisfied, and 5=totally
not satisfied.
If you take the average of the scores for each question asked, in this
instance, you will be treating this variable as following upon which of
the following measurement scales?
D
O
a. categorical
N
O
b. ordinal
T
c. nominal
C
d. continuous - ✔✔✔ Correct Answer > d. continuous
O
PY
A research that investigated the association between a vegetarian diet
and body weight found an Odds Ratio of: 0.83 (95% confidence interval
0.50 - 1.80). Select the best statement that explains these findings:
a. The vegetarian diet is significantly associated with lower body
weight
b. The vegetarian diet is significantly associated with higher body
weight
, Page 3 of 19
c. The association between the vegetarian diet and body weight is a
chance finding
d. Those consuming the vegetarian diet are 17% (that is, 1 minus 0.83 in
%) more likely to have a lower body weight than those who do not -
✔✔✔ Correct Answer > c. The association between the vegetarian diet and
body weight is a chance finding *
A positive predictive value of a test is 0.34; this means that:
D
a. 34% of the time the measure tells us that there is a problem when
O
there is none
N
b. 66% of the time the measure tells us that there is a problem when
O
there is none
T
C
c. 66% of the time the measure tells us that there is no problem when
O
there is none
PY
d. none of the above - ✔✔✔ Correct Answer > b. 66% of the time the
measure tells us that there is a problem when there is none
In a geographical region, it was found that women were five times more
likely than men to be diagnosed with a serious illness. Although the
incidence rate was higher in females, the prevalence rate of the disease
was the same in both males and females. This can be explained by the
following:
