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 14 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 = 0.35 and s = 0.7. Conduct an appropriate test at the alpha = 0.05 level of significance. choose the united hypotheses Find the test statistic (Round to Iwo decimal places as needed} Find the P-value the P-value is. (Round to three decimal places as needed.) What conclusion can he drawn? Reject H_0. There is not sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are less than the normal volume of 9 02 cm^3 Do not reject 110. There is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents a

Explanation / Answer

n=15
xbar= 8.35
s=.7

Ho: Mu = 9.02
Ha: Mu!= 9.02

to = (8.35-9.02)/(.7/sqrt(15)) = -3.707 at df = 15-1=14

The corresponding p value is .0012. Since this is less than .05/2 ( for each tail), we reject null hypothesis

Option C is the right interpreation

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