In-Class Activity Chet 5 | Birth Weights in America Name: Dominique Bradley ctivity Chot 5 | Birth Weights in America The National Center for Health Statistics (NCHS) keeps records of many health related aspects of people, including the birth weights of all babies born in the United States. The birth weight of a baby is related to its gestation Chpt 5 | Birth Weights in America Nam period (time between conception and birth). For a given gestation perio D-Class Activity can be approximated by a . For each gestation period, what is the probability that a baby will weight between 6 and 9 pounds at birth table below. normal distribution. The means and standard deviations of the birth weights for various gestation periods are shown in the Under 28 weeks 626x Eq One of the many goals of the NCHS is to reduce the percentage of babies born with low birth weights. The figure below shows the percent of preterm births and low birth weights from 2007 to 2015. Gestation Mean birth Standard period 12- weight deviation Preterm = under 37 weeks Under 28 weeks Low birth weight = under 5.5 pounds 1.60 lb 0.76 1b 28 to 31 weeks 3.20 1b 1.02 1b 32 to 33 weeks 4.31 1b 0.97 lb Percent of preterm births 34 to 36 weeks Percent 5.74 1b 1.13 1b 37 to 38 weeks 6.92 1b 1 07 1b Percent of low birth weights b. 32 to 33 weeks 39 to 40 weeks 7.60 1b 0.99 1b 41 weeks 8.00 lb 0.99 lb 2007 2008 2009 2010 2011 2012 2013 2014 2015 42 weeks and over 8.16 1b 1.12 1b Year Exercises: The distributions of birth weights for three gestation periods are shown. Match cach curve with a gestation period. Explain your reasoning. 39 to 40 weeks; The curve shown is C. 37 to 38 weeks between 7 and 8 , and the gestation period under 39 to 40 wrecks is 7.60, 50 Pound the curve fits this . 32 to 33 weeks, The curve shown is between 4 and 5, and the gestation period 32 to 33 weeks is 4-31 , which is between 4 and s, so it fits the curve. d. 41 weeks 34 to 36 weeks, The curve shown is between 5 and 6. The gestation period under 34 to 36 weeks is 5. 74, which is betwen s and 6, so it fits the curre