Kernel density estimation explainer

Imagine that those with immigrants in their family tree left the country. Almost everyone, basically.

From the teenage years to college to adulthood through retirement, sleep is all over the place at first but then converges towards consistency.

Since 1972, the General Social Survey has asked people about their happiness. It never changed much — until 2020 happened.

Some places attract young singles, whereas others attract married couples and families. I was curious how this varied across the country, so I mapped it.