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 1 year 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
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b.
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c.
Repeated measures t-test
d.
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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
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drug that lowers brain levels of serotonin. Then the researcher
tests the animals by recording the number of aggressive responses
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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 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
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