Answer
34-week baby: $z=0.606$
40-week baby: $z=0.851$
The 34-week gestation period baby weighs less relative to the 40 week baby.
Work Step by Step
$z=\frac{x-μ}{σ}$
34-week baby:
$z=\frac{3000-2600}{660}=0.606$
40-week baby:
$z=\frac{3900-3500}{470}=0.851$
The 34-week gestation period baby weighs less relative to the 40 week baby.
