The strength x of a certain material is such that its distribution is found by: where y is n (10,1). find the distribution function and pdf of x, and compute p(10,000 < x < 20,000). the random variable x is said to have a lognormal distribution.?

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?