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Credits
Sampling
Experimental Design
100
100
200
200
300
300
400
400
500
500
600
600
Sampling - 100
49, 34, and 48 students are selected from the sophomore,
Junior, and Senior classes with 496, 348, and 481 students
respectively
a.) Stratified
b.) Random
c.) Cluster
d.) Systematic
e.) Convenience
Answer
Sampling - 200
A sample consists of every 49th student from a group of
496 students.
a.) Stratified
b.) Random
c.) Cluster
d.) Systematic
e.) Convenience
Answer
Sampling - 300
A pollster uses a computer to generate 500 random numbers,
then interviews the voters corresponding to those numbers
a.) random
b.) convenience
c.) cluster
d.) systematic
e.) stratified
Answer
Sampling - 400
To avoid working late, a quality control analyst simply
inspects the first 100 items produced. This is what type of
sample?
a.) random
b.) convenience
c.) cluster
d.) systematic
e.) stratified
Answer
Sampling - 500
The name of each contestant is written on a separate card,
the cards are placed in a bag, and three names are picked
from the bag.
a.) random
b.) convenience
c.) systematic
d.) cluster
e.) stratified
Answer
Sampling - 600
An education researcher randomly selects 48 middle schools
and interviews all the teachers at each school
a.) random
b.) cluster
c.) systematic
d.) convenience
e.) stratified
Answer
Sampling - 100 Answer
49, 34, and 48 students are selected from the sophomore,
Junior, and Senior classes with 496, 348, and 481 students
respectively
a.) Stratified
Students were first divided up by class (strata), then
selected at random
Sampling - 200 Answer
A sample consists of every 49th student from a group of
496 students.
d.) Systematic
The 49th position was randomly selected, the systematic is
that each 49th position then becomes part of the sample
Sampling - 300 Answer
A pollster uses a computer to generate 500 random numbers,
then interviews the voters corresponding to those numbers
a.) random
Every individual in the population had an equally-likely
chance of being chosen and every sample of size 500 had an
equally-likely chance of being chosen
Sampling - 400 Answer
To avoid working late, a quality control analyst simply inspects
the first 100 items produced. This is what type of sample?
b.) convenience
The first 100 were convenient to the control analyst
Sampling - 500 Answer
The name of each contestant is written on a separate card,
the cards are placed in a bag, and three names are picked
from the bag.
a.) random
Each contestant has an equally-likely chance of being
chosen and each sample of size three has an equally likely
chance of being chosen
Sampling - 600 Answer
An education researcher randomly selects 48 middle schools
and interviews all the teachers at each school
b.) cluster
All the teachers in each randomly chosen school are
interviewed—(the schools are natural groups within the
population)
Experimental Design - 100
Determine whether the following is an observational
study or an experiment
A marketing firm does a survey to find out
how many people use a product. Of the one
hundred people contacted, fifteen said they
use the product.
a.) Observational
b.) Experiment
Answer
Experimental Design - 200
Determine whether the following is an experiment or
an observational study
A clinic gives a drug to a group of ten
patients and a placebo to another group of
ten patients to find out if the drug has an
effect on the patients illness.
a.) Observational
b.) Experiment
Answer
Experimental Design - 300
Which of the following is not a major principle of
experimental design?
a.)
b.)
c.)
d.)
e.)
randomization
replication
blocking
control
all of these are important principles
Answer
Probability Distn - 400
In order to assess the effects of diet on reducing cholesterol, a
researcher randomly assigned 50 people to diet A and fifty people to
diet B. They all reported to a clinic to have their cholesterol
measured. The subjects were unaware of which diet they were using,
and the technician measuring the cholesterol was not aware of which
diet the participants had used. This is a(n)
a.)
b.)
c.)
d.)
e.)
observational study
experiment, but not a double blind experiment
double blind experiment
matched pairs experiment
block design
Answer
Probability Distn - 500
An experiment was conducted by some students to explore the
nature of the relationship between a person's heart rate (measured
in beats per minute) and the frequency at which that person stepped
up and down on steps of various heights. Three rates of stepping
and two different step heights were used. A subject performed the
activity (stepping at one of the three stepping rates at one of the two
possible heights) for three minutes. Heart rate was then measured at
the end of this period. The variables "stepping rate" and "step
height" are the
a.) factors
b.) levels
c.) controls
d.) units
e.) response variables
Answer
Experimental Design - 600
A study to see the effects of caffeine on college student was
conducted. Students in 2 class times were part of the study.
Suppose half of the 8:30 students are randomly allocated to the
treatment group (two cups of coffee), the other half to the control
group (two cups of decaf). In addition, half of the 9:30 students are
randomly allocated to the treatment group, the other half to the
control group. This is an example of a
A)
voluntary response study.
B)
stratified sampling procedure.
C)
matched pairs design.
D)
completely randomized design.
E)
block design.
Answer
Exp. Design - 100 Ans.
Determine whether the following is an observational
study or an experiment
A marketing firm does a survey to find out how
many people use a product. Of the one
hundred people contacted, fifteen said they use
the product.
a.) Observational
No treatment was imposed
Exp Design - 200 Ans.
Determine whether the following is an experiment or
an observational study
A clinic gives a drug to a group of ten patients
and a placebo to another group of ten patients to
find out if the drug has an effect on the patients
illness.
b.) Experiment
The patients were given either a drug or placebo
then the effects were measured
Exp. Design - 300 Ans.
Which of the following is not a major principle of
experimental design?
e.) all of these are important principles
The four principles of design are control,
randomization, replication, and blocking
Exp Design - 400 Ans.
In order to assess the effects of diet on reducing cholesterol, a researcher
randomly assigned 50 people to diet A and fifty people to diet B. They all
reported to a clinic to have their cholesterol measured. The subjects were
unaware of which diet they were using, and the technician measuring the
cholesterol was not aware of which diet the participants had used. This is
a(n)
c.) double blind experiment
A treatment was applied (the two diets)—and neither
the subjects nor the technician knew which diet
(group) the subjects were in.
Exp. Design - 500 Ans.
An experiment was conducted by some students to explore the nature of the
relationship between a person's heart rate (measured in beats per minute)
and the frequency at which that person stepped up and down on steps of
various heights. Three rates of stepping and two different step heights were
used. A subject performed the activity (stepping at one of the three stepping
rates at one of the two possible heights) for three minutes. Heart rate was
then measured at the end of this period. The variables "stepping rate" and
"step height" are the
a.) factors
The variables “stepping rate” and “step height” are factors. “Stepping
rate” has 3 levels and “step height” has 2 levels. This means that there are
6 possible treatments.
Exp. Desigh - 600 Ans.
A study to see the effects of caffeine on college student was conducted.
Students in 2 class times were part of the study. Suppose half of the 8:30
students are randomly allocated to the treatment group (two cups of
coffee), the other half to the control group (two cups of decaf). In
addition, half of the 9:30 students are randomly allocated to the treatment
group, the other half to the control group. This is an example of a
E)
block design.
Students are “blocked” by time of class (a variable that may affect the
response variable) and then randomly assigned to the treatment or control
group
Credits
Questions have come from the
Test Bank for
Basic Practice of Statistics
And
Essentials of Statistics