Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2900 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have a mean weight of 3100 grams and a standard deviation of 410 grams. If a 32-week gestation period baby weighs 3025 grams and a 40-week gestation period baby weighs 3225 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The baby born in week 32 weighs relatively more since its z-score, ,is larger than the z-score of for the baby born in week 40. O B. The baby born in week 40 weighs relatively more since its z-score, is smaller than the z-score of for the baby born in week 32. O C. The baby born in week 32 weighs relatively more since its z-score, is smaller than the z-score of for the baby born in week 40. O D. The baby born in week 40 weighs relatively more since its z-score, is larger than the z-score of for the baby born in week 32.

Help with #2  (d)

The average amount of money spent by an Amazon customer per month is $1296 with standard deviation $110.  Assume the variable is normally distributed.  Answer the following questions. What is the probability that a random sample of 15 Amazon customers spent an average between $1100 and $1300 in a month?