If the foot length of women follows a normal distribution with a mean of 23 cm, and 81.5% have a foot length between 20 cm and 29 cm, what is your estimate of the
standard deviation of the heights in this population?

a. 2.25 cm
b. 03 cm
c. 4.5 cm
d. 9cm

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?