Question

10.3.15-T Question Help In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 18 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x = 8.03 cm and s=0.8 cm. Conduct the appropriate test at the a=0.01 level of significance. State the null and alternative hypotheses Ho: HE Enter your answer in the edit fields and then click Check Answer 3 parts 3 romsini Check Answer € 0 SPM DELL

Answer 1

Given

Claim : the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02.

hence hypothesis:

Null hypothesis

H₀ : $\mu$ = 9.02

Alternative hypothesis

H_a : $\mu$ < 9.02