A neuroscientist is interested in testing the effects of environment on dendritic branching in the hippocampus (dendrites increase the receptivity of neurons and may be an important basis of cognition). Tc test this, he took one group of rats (n = 11) and housed them in an "enriched" environment (consisting of a large box with tunnels to run through, toys to play with, etc.) and then he took another group of rats (n=11) and housed them in an "isolate" environment (rats were housed alone without any tunnels or toys). After 6 weeks, the number of dendritic spines in a particular region of the hippocampus from these rats was image and counted. The results are below. Did the different housing conditions have an effect on the number of dendrite branches? Solve using the steps in hypothesis testing. Mean number of dendrites Enriched condition 40 (Estimated) 10 Standard Deviation Isolate condition 10 4

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-The critical value(s) should be ? -Calculate the test statistic (round to two decimal places) -Calculate the effect size (Cohen’s d) -Calculate the upper 95% confidence interval (of the difference). (round to two decimal places) -
A neuroscientist is interested in testing the effects of environment on dendritic branching in the
hippocampus (dendrites increase the receptivity of neurons and may be an important basis of cognition). To
test this, he took one group of rats (n = 11) and housed them in an "enriched" environment (consisting of a
large box with tunnels to run through, toys to play with, etc.) and then he took another group of rats (n = 11)
and housed them in an "isolate" environment (rats were housed alone without any tunnels or toys). After 6
weeks, the number of dendritic spines in a particular region of the hippocampus from these rats was imaged
and counted. The results are below. Did the different housing conditions have an effect on the number of
dendrite branches? Solve using the steps in hypothesis testing.
Mean
number of
dendrites
Enriched
condition
40
(Estimated) 10
Standard
Deviation
Isolate condition
10
4
Transcribed Image Text:A neuroscientist is interested in testing the effects of environment on dendritic branching in the hippocampus (dendrites increase the receptivity of neurons and may be an important basis of cognition). To test this, he took one group of rats (n = 11) and housed them in an "enriched" environment (consisting of a large box with tunnels to run through, toys to play with, etc.) and then he took another group of rats (n = 11) and housed them in an "isolate" environment (rats were housed alone without any tunnels or toys). After 6 weeks, the number of dendritic spines in a particular region of the hippocampus from these rats was imaged and counted. The results are below. Did the different housing conditions have an effect on the number of dendrite branches? Solve using the steps in hypothesis testing. Mean number of dendrites Enriched condition 40 (Estimated) 10 Standard Deviation Isolate condition 10 4
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