### Z-score - Length of Pregnancy. A woman wrote to Dear Abby and claimed that she gave birth 308 days after a visit from her husband, who was in the Navy. Kengths of pregnancies have a mean of 268 days and a standard deviation of 15 days, Find the z score for 308 days. Is such a length unusual? What do you conclude.

Length of Pregnancy. A woman wrote to Dear Abby and claimed that she gave birth 308 days after a visit from her husband, who was in the Navy. Kengths of pregnancies have a mean of 268 days and a standard deviation of 15 days, Find the z score for 308 days. Is such a length unusual? What do you conclude?