A researcher collected data on 100 random homes in Wake County. She then created the following histogram of when each home was built. Which of the following are true? Select all that apply.
1) The mean year built is greater than the median year built.
2) The median year built is greater than the mean year built.
3) The median year built is between 1940 and 1960.
4) The median year built is between 1980 and 2000.
5) The third quartile of year built is between 2000 and 2020.
6) The first quartile of year built is between 1940 and 1960.
7) The mean year built and the median year built are equal.