Sampling distributions Imagine we are interested in US presidents Repeatedly sample sets of 5 presidents and record average age 54.6 years52 years49.4 years 57.2 years 59.8 years Average age: 56.0 years Average height: 73.1 in Died in office: 0% Last 5 presidents Average age: 51.6 years Average height: 70.3 in Died in office: 40% 20 th century presidents Average age: 58 years Average height: 70.2 in Died in office: 0% First 5 presidents