Question

11. Finding areas given raw scores and raw scores given areas In 1992, the American Academy of Pediatrics began recommending that healthy infants be placed on when they are put to bed in an attempt to decrease the inddence of sudden Infant death syndrome (SIDS). In 1998, Dr. Beth Davis and her colleagues published a study demonstrating that putting an infant to bed on his or did not slow down the pace of infant motor development. (Source: Davis, B. E, et al. (1998). Effects of sleep position on infant motor development. Pediatrics, 102,1135-1140.) her back The infants in her smple who were pu to ted on their backs began to st supported at an average age of $.1 months, with a standard deviation of 0.9 months. Assume that the age at which Infants who are put to bed on their backs began to sit supported is normally distributed. Use the folowing Distributions tool to estimate what percentage of these infants begin to sit supported: Before 6.9 months: Ater 3.3 months Between 3.3 and 6.0 months: Means o Standard Deviapin J

Answer 1