In a​ study, researchers wanted to measure the effect of alcoholon the hippocampal​ region, the portion of the brain responsiblefor​ long-term memory​ storage, in adolescents. The researchersrandomly selected 21 adolescents with
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alcohol use disorders to determine whether the hippocampalvolumes in the alcoholic adolescents were less than the normalvolume of 9.02 cm cubed. An analysis of the sample data revealedthat the hippocampal volume is approximately normal with xoverbarequals8.06 cm cubed and s equals0.7 cm cubed. Conduct theappropriate test at the alphaequals0.01 level of significance.
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