Question
In: Statistics and Probability
Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and offending....
Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and offending. A group of researchers assigned nine offenders on parole into a control group for one year and recorded the number of violent incidents perpetrated by the offenders. Then, these offenders were given the intervention for one year and the number of violent incidents perpetrated by the offenders was recorded following the treatment. The researchers are interested in testing whether the treatment had any effect on the outcome.
Control: 4 7 4 6 8 5 9 7 4
Treatment: 3 5 2 7 5 5 6 4 2
a) What is the appropriate model of the population(s)?
b) What are the appropriate hypotheses for this analysis?
c) What is/are the critical value(s) for this test using an alpha of 0.05?
d) What is the observed value of the appropriate test statistic?
e) What is your decision regarding the stated hypotheses?
f) What is the estimated effect size using Cohen’s d?
g) What is the 95% confidence interval around the difference population mean?
h) Did the intervention have an effect on the outcome?
Solutions
orchestra answered 1 year agoRelated Solutions
Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and offending....
Correctional services were interested in evaluating a
cognitive-behavioural based intervention designed to reduce
violence and offending. A group of researchers randomly assigned 18
offenders into either a control group or a treatment group.
Offenders in the treatment group received the intervention for one
year prior to their release while those in the control group
received no intervention prior to their release. The researchers
then gathered data on the number of violent incidents perpetrated
by offenders over the five years after...
8) Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and...
8) Correctional services were interested in evaluating a
cognitive-behavioural based intervention designed to reduce
violence and offending. A group of researchers assigned nine
offenders on parole into a control group for one year and recorded
the number of violent incidents perpetrated by the offenders. Then,
these offenders were given the intervention for one year and the
number of violent incidents perpetrated by the offenders was
recorded following the treatment. The researchers are interested in
testing whether the treatment had any...
8) Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and...
8) Correctional services were interested in evaluating a
cognitive-behavioural based intervention designed to reduce
violence and offending. A group of researchers assigned nine
offenders on parole into a control group for one year and recorded
the number of violent incidents perpetrated by the offenders. Then,
these offenders were given the intervention for one year and the
number of violent incidents perpetrated by the offenders was
recorded following the treatment. The researchers are interested in
testing whether the treatment had any...
7) Correctional services were interested in evaluating a cognitive-behavioural based intervention designed to reduce violence and...
7) Correctional services were interested in evaluating a
cognitive-behavioural based intervention designed to reduce
violence and offending. A group of researchers randomly assigned 18
offenders into either a control group or a treatment group.
Offenders in the treatment group received the intervention for one
year prior to their release while those in the control group
received no intervention prior to their release. The researchers
then gathered data on the number of violent incidents perpetrated
by offenders over the five years...
8) USE dependent test formula- Correctional services were interested in evaluating a cognitive-behavioural based intervention designed...
8) USE dependent test formula-
Correctional services were interested in evaluating a
cognitive-behavioural based intervention designed to reduce
violence and offending. A group of researchers assigned nine
offenders on parole into a control group for one year and recorded
the number of violent incidents perpetrated by the offenders. Then,
these offenders were given the intervention for one year and the
number of violent incidents perpetrated by the offenders was
recorded following the treatment. The researchers are interested in
testing whether...
10) Correctional services were interested in further evaluating a cognitive-behavioural based intervention. The same group of...
10) Correctional services were interested in further evaluating
a cognitive-behavioural based intervention. The same group of
researchers randomly assigned 15 offenders into a low intensity,
medium intensity, or high intensity intervention program. The
researchers then gathered data on the number of violent incidents
perpetrated by offenders over the five years after their release.
They were interested in whether the intensity of the intervention
program had any effect on the outcome.
Low :9 8 6 8 7
Medium:8 7 5 6...
10) Correctional services were interested in further evaluating a cognitive-behavioural based intervention. The same group of...
10) Correctional services were interested in further evaluating
a cognitive-behavioural based intervention. The same group of
researchers randomly assigned 15 offenders into a low intensity,
medium intensity, or high intensity intervention program. The
researchers then gathered data on the number of violent incidents
perpetrated by offenders over the five years after their release.
They were interested in whether the intensity of the intervention
program had any effect on the outcome.
Low : 9 8 6 8 7
Medium: 8 7...
Correctional services were interested in further evaluating a cognitive-behavioural based intervention. The same group of researchers...
Correctional services were interested in further evaluating a
cognitive-behavioural based intervention. The same group of
researchers randomly assigned 15 offenders into a low intensity,
medium intensity, or high intensity intervention program. The
researchers then gathered data on the number of violent incidents
perpetrated by offenders over the five years after their release.
They were interested in whether the intensity of the intervention
program had any effect on the outcome.
Low:9 8 5 8 7 Medium: 6 6 5 7 8...
A warden is interested in the ability of two different violence reduction programs to reduce violent...
A warden is interested in the ability of two different violence
reduction programs to reduce violent interactions in her prison. To
test for differences, the warden randomizes two groups implementing
one program to each group. The amount of violent interactions per
inmate is presented below. Using α = .05, perform an independent
sample t test of significance.
Program A
Program B
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8
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3
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4
7
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7
3...
A recent study conducted compared two strategies that are designed to reduce violence among inmates in...
A recent study conducted compared two strategies that are
designed to reduce violence among inmates in large prisons.
Strategy A involved counseling (e.g. crisis intervention). Strategy
B involved punishment (e.g. solitary confinement). Violent
confrontations were measured in two similar prison settings prior
to and then after the implementation of either strategy. The
researchers used a t-test to compare the before and after violent
incidents at each prison. The statistical significance of these
t-tests is below and represented as a p...
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