What is the Sample? Twenty SecondsIn the 1800s, childbirth was a much more complicated matter than it is now, with manywomen dying during or soon after childbirth. Many doctors were stumped as to why somany women were dying and named the unknown illness as "childbirth fever."At the time, Dr. Semmelweis was Chief Resident in the maternity clinic at ViennaGeneral Hospital and stepped in to try and figure out what was going on. What putSemmelweis on the right path was observing that in one ward of the hospital it wasmostly doctors who took care of childbirth, while in the other it was mostly midwives. Inthe doctors' ward around 10% of women died of the "childbirth fever", whileonly 4% died in the midwives' one.Semmelweis realized that the doctors were going from one patient to the next, onesurgery to the next, and even sometimes from autopsies directly to childbirth - allwithout washing their hands in between. In the midwives' ward, they were washing theirhands more frequently with a chemical similar to our current day bleach.After then, Semmelweis ordered doctors to wash their hands in between every patient.The difference was stark: in April 1847 the doctors' ward's death rate was 18.7%, andonce they implemented hand washing the rate went down to 2.2% by June 1847.Unfortunately for Semmelweis, many peers rejected his proposition and mocked him,carrying on with their non-hand-washing ways and compromising the lives of many morepeople. It wasn't until the 1850s that people started washing their hands properly.Today, we know without a doubt that bacteria and viruses exist, and now more than everwe need to make sure to wash our hands regularly for at least 20 seconds.

Given Information: In 1800s, the death rate of women due to childbirth fever in the doctor's ward is 10% and the death rate of women due to childbirth fever in the midwives' ward is 4%. In April 1847, the death rate of women due to childbirth fever in the doctor's ward is 18.7%. In June 1847, after the doctors wash their hands in between every patient, the death rate of women reduced to 2.2%. The objective is to identify the sample. Sample is a subset of the population that represents all the characteristics of the population. In the given study, the sample is the women deaths in doctor wards who have implemented the hand washing in between every patient.