CHW FINAL EXAM | QUESTIONS AND ANSWERS | VERIFIED
ANSWERS GRADED A+ | LATEST EXAM UPDATE
in a normal distribution what percent of scores fall within one standard
deviation of the mean
68%
if the researcher sets the alpha (a) at .05 and the data analysis reveals that
the p-value is .04 then the researcher will:
Reject the null hypothesis
OxO
Quasi experimental pretest/ posttest
in which of the following research designs would the threat to the internal
validity of testing be of most concern?
OXO
OO
Type 1 Alpha error occurs when
The researcher rejects the null hypothesis when the null hypothesis is true
Simple regression analysis is used to:
Make predictions about the change in a dependent variable as the
independent variable changes for the population
Which of the following represents the strongest correlation?
-.08
A survey that is distributed to a class is an example of what type of data?
cross-sectional
Which of the following inferential statistical procedures would be used to
predict the effects of age, weight, and LDL cholesterol level on blood
pressure in population?
multiple linear regression
,Parametric statistics can be used with which type of distribution of data
(assuming interval/ ratio level data)?
normal distribution
Which of the following research designs would cause the reviewer to be
most concerned about the impact of selection bias as a threat to the study's
internal validity?
XO
O
Parametric statistics can be used for all of the following types of data
except?
Ordinal
How would you describe the strength of this relationship
weak
Which measure of central tendency is the arithmetic average of all values
of the data set?
mean
When should the alpha (a) level be set by the research?
before data analysis
ROXO
ROO
True Experiment- Two Group Pretest/post test
If a researcher is interested in exploring the relationship between smoking
and the development of lung cancer, the researcher can review the health
records of persons who have been given a diagnosis of lung cancer to
determine whether or not they smoke/ever smoked. This is an example of
what type of data collection?
retrospective
This is an example of:
positive, strong correlation
Which type of sampling technique is most likely a result in a sample that is
representative of the larger population?
, simple random sampling
Correlation is a measure of:
association
quantitative research designs include
1) true experimental designs
2) quasi-experimental designs
3) non-experimental designs
RCT
-highest level
-ROXO
RO O
-true RCT has random selection and random assignment
-(Gold standard) most rigorous
-internal validity can be improved with blinding:
-double-blind=subjects don't know what group and researchers don't know
-single-blind=subjects don't know what group they are in (placebo affect)
pretest-posttest (follow up) design(RCT)
-ROXO O
RO O O
-there is a follow up observation so researcher can see effect over time
-threats to internal validity: maturation and mortality
post-test design only (RCT)
-RXO
RO
-eliminate testing effect
-may be used if pretest could effect outcome
-down side to no pretest: homogeneity=similar groups
Solomon four group design
-ROXO1
RO O2
R X O3
R O4
-may be used in cases where the researcher is concerned that the pre test
ANSWERS GRADED A+ | LATEST EXAM UPDATE
in a normal distribution what percent of scores fall within one standard
deviation of the mean
68%
if the researcher sets the alpha (a) at .05 and the data analysis reveals that
the p-value is .04 then the researcher will:
Reject the null hypothesis
OxO
Quasi experimental pretest/ posttest
in which of the following research designs would the threat to the internal
validity of testing be of most concern?
OXO
OO
Type 1 Alpha error occurs when
The researcher rejects the null hypothesis when the null hypothesis is true
Simple regression analysis is used to:
Make predictions about the change in a dependent variable as the
independent variable changes for the population
Which of the following represents the strongest correlation?
-.08
A survey that is distributed to a class is an example of what type of data?
cross-sectional
Which of the following inferential statistical procedures would be used to
predict the effects of age, weight, and LDL cholesterol level on blood
pressure in population?
multiple linear regression
,Parametric statistics can be used with which type of distribution of data
(assuming interval/ ratio level data)?
normal distribution
Which of the following research designs would cause the reviewer to be
most concerned about the impact of selection bias as a threat to the study's
internal validity?
XO
O
Parametric statistics can be used for all of the following types of data
except?
Ordinal
How would you describe the strength of this relationship
weak
Which measure of central tendency is the arithmetic average of all values
of the data set?
mean
When should the alpha (a) level be set by the research?
before data analysis
ROXO
ROO
True Experiment- Two Group Pretest/post test
If a researcher is interested in exploring the relationship between smoking
and the development of lung cancer, the researcher can review the health
records of persons who have been given a diagnosis of lung cancer to
determine whether or not they smoke/ever smoked. This is an example of
what type of data collection?
retrospective
This is an example of:
positive, strong correlation
Which type of sampling technique is most likely a result in a sample that is
representative of the larger population?
, simple random sampling
Correlation is a measure of:
association
quantitative research designs include
1) true experimental designs
2) quasi-experimental designs
3) non-experimental designs
RCT
-highest level
-ROXO
RO O
-true RCT has random selection and random assignment
-(Gold standard) most rigorous
-internal validity can be improved with blinding:
-double-blind=subjects don't know what group and researchers don't know
-single-blind=subjects don't know what group they are in (placebo affect)
pretest-posttest (follow up) design(RCT)
-ROXO O
RO O O
-there is a follow up observation so researcher can see effect over time
-threats to internal validity: maturation and mortality
post-test design only (RCT)
-RXO
RO
-eliminate testing effect
-may be used if pretest could effect outcome
-down side to no pretest: homogeneity=similar groups
Solomon four group design
-ROXO1
RO O2
R X O3
R O4
-may be used in cases where the researcher is concerned that the pre test
