C955 Applied Probability and Statistics Question and answers
already passed 2025
1. Which of the following is a primary takeaway message Do not use
samples of dif-
from the lesson on Simpson's paradox? ferent sizes.
2. In order to study the relationship between Stratified
customer satisfaction and health plan type, an
insurance compa- ny surveyed 100 members
from each of its 55 health plans offered. What
sampling method did they em- ploy?
3. Consider the following equation y=7.5x+9.3 7.5
What is the slope of a line with this equation?
4. A researcher studied the effect of epidural Yes, because this is a con-
steroid in- jections for chronic lumbar pain. trolled experiment.
Patients eligible for the study were randomly
assigned to two groups. One group received an
epidural injection with the steroid and a local
anesthetic. The second group received
an epidural injection with the local anesthetic. It
was found that the epidural injection of the
steroid pro- duced a decrease in pain level
among the patients. Can the researcher claim
there is a causal relationship be- tween the
No, the sampling frame in
steroid injection and decreased pain level?
5. 7) A college wants to study if there is a
relationship
between the health of students enrolled at the univer- this study
introduced bias
sity and the number of credit hours they are all studen
enrolled in. They pull the student numbers of who use
,C955 Applied Probability and Statistics Question and answers
already passed 2025
the gym in the last month and randomly because it is not represen
selected tative of the population.
200. They then asked them how many hours
he/she exercised in the last week and how
many credit hours he/she is enrolled in and
based on the data announced that the fewer
credit hours a student is enrolled in at
,C955 Applied Probability and Statistics Question and answers
already passed 2025
the university, the more hours per week the
student exercises. Is this a valid conclusion?
6. The b in y=mx+b is what? Both A and B
7. Which of the following can help prevent Having an equal num-
Simpson's Paradox from occurring? ber of subjects exposed t
each of the treatments in
each trial.
8. In order to examine a possible relationship Cluster
between age and political affiliation, on the day
of the last pres- idential election, BCA news
organized an exit poll in which specific polling
stations were randomly selected and all voters
were surveyed as they left the premises. What
type of sampling method did BCA news employ?
9. What is the stratified sampling method? the division of a popu-
lation into smaller sub-
groups
10. What is the voluntary sample method? when researchers
seek volunteers to
participate in studies
11. What is the cluster sample method? divides a population
into smaller groups.
They then randomly
select among these
to form a sample
12. What is simple random sampling method? the researcher randomly
selects a subset of partic-
already passed 2025
1. Which of the following is a primary takeaway message Do not use
samples of dif-
from the lesson on Simpson's paradox? ferent sizes.
2. In order to study the relationship between Stratified
customer satisfaction and health plan type, an
insurance compa- ny surveyed 100 members
from each of its 55 health plans offered. What
sampling method did they em- ploy?
3. Consider the following equation y=7.5x+9.3 7.5
What is the slope of a line with this equation?
4. A researcher studied the effect of epidural Yes, because this is a con-
steroid in- jections for chronic lumbar pain. trolled experiment.
Patients eligible for the study were randomly
assigned to two groups. One group received an
epidural injection with the steroid and a local
anesthetic. The second group received
an epidural injection with the local anesthetic. It
was found that the epidural injection of the
steroid pro- duced a decrease in pain level
among the patients. Can the researcher claim
there is a causal relationship be- tween the
No, the sampling frame in
steroid injection and decreased pain level?
5. 7) A college wants to study if there is a
relationship
between the health of students enrolled at the univer- this study
introduced bias
sity and the number of credit hours they are all studen
enrolled in. They pull the student numbers of who use
,C955 Applied Probability and Statistics Question and answers
already passed 2025
the gym in the last month and randomly because it is not represen
selected tative of the population.
200. They then asked them how many hours
he/she exercised in the last week and how
many credit hours he/she is enrolled in and
based on the data announced that the fewer
credit hours a student is enrolled in at
,C955 Applied Probability and Statistics Question and answers
already passed 2025
the university, the more hours per week the
student exercises. Is this a valid conclusion?
6. The b in y=mx+b is what? Both A and B
7. Which of the following can help prevent Having an equal num-
Simpson's Paradox from occurring? ber of subjects exposed t
each of the treatments in
each trial.
8. In order to examine a possible relationship Cluster
between age and political affiliation, on the day
of the last pres- idential election, BCA news
organized an exit poll in which specific polling
stations were randomly selected and all voters
were surveyed as they left the premises. What
type of sampling method did BCA news employ?
9. What is the stratified sampling method? the division of a popu-
lation into smaller sub-
groups
10. What is the voluntary sample method? when researchers
seek volunteers to
participate in studies
11. What is the cluster sample method? divides a population
into smaller groups.
They then randomly
select among these
to form a sample
12. What is simple random sampling method? the researcher randomly
selects a subset of partic-
