EMILLYCHARLOTTE 2024/2025 ACADEMIC YEAR ©2024 ALL RIGHTS RESERVED,
FIRST PUBLISH SEPTEMBER 2024
CCJ 4700 Exam 2 Stewart Questions
and Answers | 100% Pass
What are the 3 components of a classical experiment? - Answer✔✔-1)Pre & Post-
Testing
2)Experimental & Control groups
3)Random Assignment
____________ Assignment Is a central feature of the classical experiment -
Answer✔✔-Random Assignment
Random assignment... - Answer✔✔-Reduces sources of bias & Creates equivalent
groups
Criteria for causality: - Answer✔✔-1)Cause must come before effect
2)We have to show cause(x) came before effect(y)
3)We have to rule out rival explanations
Threats to internal validity: - Answer✔✔--History(past events may confound results)
-Testing(Retesting influences peoples behavior)
-Selection Bias(volunteers may choose to participate in certain study)
Why do we use sampling? - Answer✔✔-Bc... Its often not possible to collect info from
all persons we wish to study & Its often not necessary
1/8
, EMILLYCHARLOTTE 2024/2025 ACADEMIC YEAR ©2024 ALL RIGHTS RESERVED,
FIRST PUBLISH SEPTEMBER 2024
Two things to do when selecting samples: - Answer✔✔-Select samples to represent
a larger pop. of people/things & generalize from a sample to an unobserved population
the sample is intended to represent
When is a sample "representative" of the population? - Answer✔✔-When the
aggregate characteristics of the sample closely approx. those same characteristics in
the population
2 adv. of population samples: - Answer✔✔--Typically more representative than other
types of samples because they avoid biases
-Permits us to estimate the accuracy of the sample
Why is standard error important? - Answer✔✔-Bc it indicates how closely the sample
estimates will be distributed around the population parameter
As sample size increase ---> Standard error _______ - Answer✔✔-Decreases
If sample size is quadrupled then standard error is: - Answer✔✔-Reduced by 1/2
What is the sampling Frame? - Answer✔✔-List of the population that one is
interested in studying
What are the types of probability samples? - Answer✔✔--SRS
-Systematic
-Stratified
-Cluster
SRS - Answer✔✔-Number is assigned to each member in the frame and then a
random number generator selects elements
Systematic - Answer✔✔-You randomly select every nth number on a list
2/8
FIRST PUBLISH SEPTEMBER 2024
CCJ 4700 Exam 2 Stewart Questions
and Answers | 100% Pass
What are the 3 components of a classical experiment? - Answer✔✔-1)Pre & Post-
Testing
2)Experimental & Control groups
3)Random Assignment
____________ Assignment Is a central feature of the classical experiment -
Answer✔✔-Random Assignment
Random assignment... - Answer✔✔-Reduces sources of bias & Creates equivalent
groups
Criteria for causality: - Answer✔✔-1)Cause must come before effect
2)We have to show cause(x) came before effect(y)
3)We have to rule out rival explanations
Threats to internal validity: - Answer✔✔--History(past events may confound results)
-Testing(Retesting influences peoples behavior)
-Selection Bias(volunteers may choose to participate in certain study)
Why do we use sampling? - Answer✔✔-Bc... Its often not possible to collect info from
all persons we wish to study & Its often not necessary
1/8
, EMILLYCHARLOTTE 2024/2025 ACADEMIC YEAR ©2024 ALL RIGHTS RESERVED,
FIRST PUBLISH SEPTEMBER 2024
Two things to do when selecting samples: - Answer✔✔-Select samples to represent
a larger pop. of people/things & generalize from a sample to an unobserved population
the sample is intended to represent
When is a sample "representative" of the population? - Answer✔✔-When the
aggregate characteristics of the sample closely approx. those same characteristics in
the population
2 adv. of population samples: - Answer✔✔--Typically more representative than other
types of samples because they avoid biases
-Permits us to estimate the accuracy of the sample
Why is standard error important? - Answer✔✔-Bc it indicates how closely the sample
estimates will be distributed around the population parameter
As sample size increase ---> Standard error _______ - Answer✔✔-Decreases
If sample size is quadrupled then standard error is: - Answer✔✔-Reduced by 1/2
What is the sampling Frame? - Answer✔✔-List of the population that one is
interested in studying
What are the types of probability samples? - Answer✔✔--SRS
-Systematic
-Stratified
-Cluster
SRS - Answer✔✔-Number is assigned to each member in the frame and then a
random number generator selects elements
Systematic - Answer✔✔-You randomly select every nth number on a list
2/8
