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 hippcampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cubed. An analysis of the sample data revealed that the hippcampal volume is approximately normal with x =8.28 and s =0.8 conduct an appropriate test at the a =0.05 level of significance. Find the test statistic to=? The P=value is? Is there sufficient or not sufficient evidence that the hippcampal volumes are less or greater than the normal of 9.02 cubed?

Answer 1

(5) Final conclusion

Therefore there is sufficient evidence that the hippcampal volumes are less than the normal of 9.02 cube.