Birth Lengths Babies born after 40 weeks gestation have a mean length of 52.2 centimeters (about 20.6 inches). Babies born one month early have a mean length of 47.4 centimeters. Assume both standard deviations are 2.5 centimeters and the distributions are unimodal and symmetric. (Source: www.babycenter.com) a. Find the standardized score ( z -score), relative to all U.S. births, for a baby with a birth length of 45 centimeters. b. Find the standardized score of a birth length of 45 centimeters for babies born one month early, using 47.4 as the mean. c. For which group is a birth length of 45 centimeters more common? Explain what that means.
Birth Lengths Babies born after 40 weeks gestation have a mean length of 52.2 centimeters (about 20.6 inches). Babies born one month early have a mean length of 47.4 centimeters. Assume both standard deviations are 2.5 centimeters and the distributions are unimodal and symmetric. (Source: www.babycenter.com) a. Find the standardized score ( z -score), relative to all U.S. births, for a baby with a birth length of 45 centimeters. b. Find the standardized score of a birth length of 45 centimeters for babies born one month early, using 47.4 as the mean. c. For which group is a birth length of 45 centimeters more common? Explain what that means.
Solution Summary: The author calculates the z-score for a baby born after 40 weeks gestation period, relative to all the births in the U.S.
Birth Lengths Babies born after 40 weeks gestation have a mean length of 52.2 centimeters (about 20.6 inches). Babies born one month early have a mean length of 47.4 centimeters. Assume both standard deviations are 2.5 centimeters and the distributions are unimodal and symmetric. (Source: www.babycenter.com)
a. Find the standardized score (z-score), relative to all U.S. births, for a baby with a birth length of 45 centimeters.
b. Find the standardized score of a birth length of 45 centimeters for babies born one month early, using 47.4 as the mean.
c. For which group is a birth length of 45 centimeters more common? Explain what that means.
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