Question
In: Statistics and Probability
A neuroscientist studies the role of the brain chemical serotonin in aggression. One sample of rats...
A neuroscientist studies the role of the brain chemical serotonin in aggression. One sample of rats serves as a control group and receives a placebo. 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 presented below.
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a. |
Using a one-tailed test with a = .01, decide if the drug have a significant effect on aggression. Include the null hypothesis in symbols, critical region(s), and a conclusion about significance. (9 points) |
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b. |
Use Cohen's d to measure the effect size and state the size of the effect (e.g. small, medium, large). (3 points) |
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Low Serotonin |
Control |
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n = 4 |
n = 8 |
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M = 24 |
M = 14 |
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SS = 76 |
SS = 164 |
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orchestra answered 2 years agoRelated Solutions
A neuroscientists studies the role of the brain chemical serotonin in aggression. One sample of rats...
A neuroscientists studies the role of the brain chemical
serotonin in aggression. One sample of rats serves as a control
group and receives a placebo. 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 presented below. a. Using a
one-tailed test with = .01, decide if the drug have a significant
effect on...
A researcher studies the role of the brain chemical serotonin in aggression. One sample of rats...
A researcher studies the role of the brain chemical serotonin in
aggression. One sample of rats receives a placebo while another
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. What
statistical test could be used to analyze data from this study?
a.
Independent measures t-test
b.
Independent measures ANOVA
c.
Repeated measures t-test
d.
Both a and b
6. A neuroscientists studies the role of the brain chemical serotonin in aggression. One sample of...
6. A neuroscientists studies the role of the brain chemical
serotonin in aggression. One sample of rats serves as a control
group and receives a placebo. 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 presented below.
a. Using a one-tailed test with alpha level = .01, decide if the
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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
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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
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2) A researcher conducts an independent-measures study examining how the brain chemical serotonin is related to...
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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...
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QUESTION: Sunlight and serotonin Sunlight and darkness trigger the release of hormones in your brain. Exposure...
QUESTION:
Sunlight and
serotonin
Sunlight and darkness
trigger the release of hormones in your brain. Exposure to sunlight
is thought to increase the brain’s release of a hormone called
serotonin. Serotonin is associated with boosting mood and helping a
person feel calm and focused. At night, darker lighting triggers
the brain to make another hormone called melatonin. This hormone is
responsible for helping you sleep.
Without enough sun
exposure, your serotonin levels can dip. Low levels of serotonin
are associated...
QUESTION: Sunlight and serotonin Sunlight and darkness trigger the release of hormones in your brain. Exposure...
QUESTION:
Sunlight and
serotonin
Sunlight and darkness
trigger the release of hormones in your brain. Exposure to sunlight
is thought to increase the brain’s release of a hormone called
serotonin. Serotonin is associated with boosting mood and helping a
person feel calm and focused. At night, darker lighting triggers
the brain to make another hormone called melatonin. This hormone is
responsible for helping you sleep.
Without enough sun
exposure, your serotonin levels can dip. Low levels of serotonin
are associated...
We collect data on a sample of 5 people regarding pretest aggression. The aggression measure is...
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aggression. The aggression measure is on a scale of 1 = low
aggression to 10 = high aggression. After initial data collection,
we do an intervention aimed at improving self-control and reducing
aggression. After the intervention, we measure the same 5 people
with the same aggression measure to get a posttest measure of
aggression.
Subject ID number
Pretest Aggression
Posttest Aggression
1
5
1
2
3
2
3
9...
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