Question
In: Statistics and Probability
A researcher conducts an independent-measures study examining how the violence of a TV show is related...
A researcher conducts an independent-measures study examining how the violence of a TV show is related to aggression in children. To study this question they bring children into the lab and have one sample of children watch a non-violent TV show for 20 minutes. They have a second sample of children watch a violent TV show for 20 minutes. After the TV show, the researcher examines the children's aggression by recording the number of aggressive responses each of the children display. The data are as follows.
Non-Violent TV n = 10 M = 14 SS = 180.5
Violent TV n = 15 M = 19 SS = 130.0
a. Conduct the 4 steps of hypothesis testing to determine whether the level of violence in TV has a significant effect on aggression? Use an alpha level of .05, two tails
b. Compute Cohen’s d to measure the size of the treatment effect and explain what Cohen's d tells you about the research question
c. Write your results in APA format
Solutions
orchestra answered 2 years agoRelated Solutions
2) A researcher conducts an independent-measures study examining how the brain chemical serotonin is related to...
2) A researcher conducts an independent-measures study examining
how the brain chemical serotonin is related to aggression. One
sample of rats serves as a control group and receives a placebo
that does not affect normal levels of serotonin. A second sample of
rats receives a drug that lowers brain levels of serotonin. Then
the researcher tests the animals by recording the number of
aggressive responses each of the rats display. The data are as
follows.
Control n = 10 M...
A researcher conducts an independent-measures study examining the effectiveness of a group exercise program at an...
A researcher conducts an independent-measures study examining
the effectiveness of a group exercise program at an assisted living
facility for elderly adults. One group of residents is selected to
participate in the program, and a second group serves as a control.
After 6 weeks, the researcher records a combined score measuring
balance and strength for each individual. The data are as follows:
(9 POINTS)
Control
Exercise
n = 10
n = 15
M = 12
M = 15.5
SS =...
A researcher conducts an independent-measures study examining the effectiveness of a group exercise program at an...
A researcher conducts an independent-measures study examining
the effectiveness of a group exercise program at an assisted living
facility for elderly adults. One group of residents is selected to
participate in the program, and a second group serves as a control.
After 6 weeks, the researcher records a combined score measuring
balance and strength for each individual. The data are as
follows:
Control Exercise
n1 =
10
n2
= 15
M1 =
12
M2 = 15.5
...
A researcher conducts an independent-measures study examining the effectiveness of a group exercise program at an...
A researcher conducts an independent-measures study examining
the effectiveness of a group exercise program at an assisted living
facility for elderly adults. One group of residents is selected to
participate in the program, and a second group serves as a control.
After 6 weeks, the researcher assessed physical fitness of each
participant.
The data are as follows: Exercise Group: Control Group: n = 15 n
= 15 M = 37 M = 34 SS = 230 SS = 160 A....
A researcher conducts an independent-measures study to examine how the brain chemical serotonin is related to...
A researcher conducts an independent-measures study to examine
how the brain chemical serotonin is related to aggression. One
sample of rats serves as a control group and receives a placebo
that does not affect normal levels of serotonin. A second sample of
rats, low serotonin group, receives a drug that lowers brain levels
of serotonin. Then, the researcher tests the animals by recording
the number of aggressive responses each of the rats display. See
the data below. Is there a...
RESEARCH SCENERIO A researcher conducts an independent-measures study examining the effectiveness of a group exercise program...
RESEARCH SCENERIO A
researcher conducts an independent-measures study examining the
effectiveness of a group exercise program at an assisted living
facility for elderly adults. One group of residents is selected to
participate in the program, and a second group serves as a control.
After 6 weeks, the researcher records a combined score measuring
balance and strength for each individual. The data are as
follows:
Control
Exercise
n =
12
n =
15
M...
A researcher conducts an independent groups study examining the effectiveness of diet type on a sample...
A researcher conducts an independent groups study examining the
effectiveness of diet type on a sample of overweight adults. An
independent-measures t-test is used to analyze the dada. one-half
of the adults receive a vegetarian diet and the other half receives
a low carb, protein-rich diet. the two groups have equal sample
sizes. After 6 weeks of dieting, the researcher records body weight
information (in pounds) for both groups. the data are as follows (
assume that the difference between...
A researcher conducts an independent-measures study. One sample of individuals serves as a control group and...
A researcher conducts an independent-measures study. One sample
of individuals serves as a control group and another sample serves
as a treatment group. The researcher hypothesizes that the two
samples will be different on the dependent variable.
The data are as follows:
Control
Treatment
n = 6
n = 9
M = 56
M = 62
SS = 470
SS = 700
α = .05, two-tailed
a.) Following the steps of a hypothesis test, first determine
whether the two groups...
This prompt is for the next 8 questions. A researcher conducts a study examining the effectiveness...
This prompt is for the next 8 questions. A researcher conducts a
study examining the effectiveness of a group exercise program for
elderly adults at an assisted living facility. One group of
residents is selected to participate in the program, and a second
group serves as a control group. After the program, the researcher
measures each person’s strength. The data are as follows: Control
Exercise n = 10 n = 15 top enclose x = 12 top enclose x =...
A researcher conducts a repeated-measures t-test to evaluate a treatment with a sample of n =...
A researcher conducts a repeated-measures t-test to evaluate a
treatment with a sample of n = 16 participants and obtains a t
statistic of t = 2.94. The treatment is expected to change scores
on a task. Which of the following is the correct decision for a
hypothesis test using α = .05.
Fail to reject the null hypothesis with either a one-tailed or a
two-tailed test.
Reject the null hypothesis with a one-tailed test but fail to
reject with...
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