Question Babies with low birth weight (< 2500 g) may have health issues. Mean birth weight is 3496 g, but 2646 g for babies born 1 month early. Find standardized score (z-score) for 2500 g birth weight for: a) all births, b) 1 month early births. Determine which group 2500 g is more common.
a. $z=-2.17$ b. $z=-0.32$ c. B. A birth weight of 2500 g is more common for all births in the country.

Studdy Solution
Choose the correct answer based on the explanation.
A. A birth weight of 2500 grams is more common for babies born one month early. This makes sense because babies gain weight during gestation, and babies born one month early had less time to gain weight.
The solution to the problem is:
a. The standardized score (z-score) for a baby with a birth weight of 2500 grams relative to all births in the country is $z = -2.17$. b. The standardized score for a birth weight of 2500 grams for a child born one month early is $z = -0.32$. c. A birth weight of 2500 grams is more common for babies born one month early.