Question

2) Having a baby in a US Hospital costs $ 2528 on average. Active Management of Labor, (AML) is a group of interventions designed to help reduce the length of labor and of Caesarian Sections. With AML assistance, a random sample of 200 baby deliveries had a mean cost of $ 2480 with a standard deviation of $ 766. At the 5% level of significance, do the data provide sufficient evidence to conclude that AML reduces the cost of having a baby in a US Hospital? 3) In a study published by the American Journal of Psychiatry (May 2019) researchers wanted to measure the effect of alcohol on the hippocampal region of the brain in adolescents. 12 adolescents who use alcohol were randomly chosen. Hippocampal volumes were examined. The mean hippocampal volume for the whole population is 9.03 cubic centimeters. An analysis revealed that the mean hippocampal in the 12 chosen subjects was 8.1 cubic centimeters with a standard deviation of 0.7 cubic centimeters. At the 1% level of significance, can it be concluded that the adolescents have a lower hippocampal volume? I

Answer 1

2528 VS Sap2 Son 2) Testing of hypothesis: to i fl= Ha: Ml + 2528 Test statistic, Z= ñ-M also 2528 71200 -0.89 P-value = 0.1867 Conclusion we fail to Reger Ho Senice P-value <0:05 = 2480 766 는 CS Scanned with CamScanner