Boys Heights Heights of ten year old boys (5th graders) follow an approximate normal distribution with mean u = 55.5 inches and standard deviation o = 2.7 inches.] Centers for Disease Control and Prevention growth chart at http://www.cdc.gov/growthcharts/html_charts/statage.htm. (a) According to this normal distribution, what proportion of 10-year-old boys are between 4 ft 4.5 in and 5 ft 3.5 in tall (between 52.5 inches and 63.5 inches)? Round your answer to three decimal places. Proportion = 0.929 eTextbook and Media (b) A parent says his 10-year-old son is in the 99th percentile in height. How tall is this boy? Round your answer to two decimal places. Height = i C 1 inches e Textbook and Media