Researchers wanted to measure the effect of alcohol on the development of the hi

Question

Researchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders. They wanted to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm^3. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x = 8.16 and s = 0.9. Conduct an appropriate test at the alpha = 0.05 level of significance. Choose the correct hypotheses. H_0: 9.02 H_1: 9.02

Explanation / Answer

Here the claim is less than so it is left-tailed test. The null hypothesis will take greater than or equal to sign and the alternative hypothesis will take less than sign. Here the parameter to be tested is population mean.

Answer:

H0: µ 9.02

H1: µ < 9.02

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