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 22 adolescents with alcohol use disorders todetermine whether the hippocampal volumes in the alcoholicadolescents were less than the normal volume of 9.02cm3. Ananalysis of the sample data revealed that the hippocampal volume isapproximately normal with
x overbarxequals=8.06cm3 and s=0.7cm3. Conduct the appropriatetest at the ?=0.01 level of significance.
(a) State the null and alternative hypothese
(b) Identify the t- statistic and p value
(c) Conclusion: (reject/Fail to reject) __ the null hypothesis.There (is/is not) __ sufficent evidence to claim that the meanhippocampal volume is (equal to/less than/greater than) __ __cm3
