Question

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 24 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 no outliers and 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. HOP HP (Type integers or decimals. Do not round) Identify the t-statistic. (Round to two decimal places as needed) Identify the P-value P-value = (Round to three decimal places as needed.) - Fnter your answer in each of the answer boxes

help with all parts please

Answer 1

Solution:

Solutions Here using the given information we give the answer such as, Hypothesis Ho: M=9.02 cm² Hi: u < 9.02 cm2 Now Test statistic is 8.03-9.02 Hoa ž-u. Sun = 0.8/104 to=-6.06 Noco p-value =0.000 NOLO, fail to Reject the hall hypothesis There is not sufficient evidence to claim that the mean hippocamper volume is less than 9.02 cm?

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