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 20 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 8.94 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x = 8.05 cm and s = 0.7 cm. Conduct the appropriate test at the a = 0.05 level of significance. Click the icon to view the table of critical t-values. State the null and alternative hypotheses. Ho H H: cm cm (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Approximate the P-value. The P-value is in the range Make a conclusion regarding the hypothesis. the null hypothesis. There sufficient evidence to claim that the mean hippocampal volume is cm (Type an integer or a decimal. Do not round.)