Interval data is like ordinal except we can say the intervals between each value are equally split. The most common example is temperature in degrees Fahrenheit. The difference between 29 and 30 degrees is the same magnitude as the difference between 78 and 79 (although I know I prefer the latter).
Bethlehem is a city in Lehigh and Northampton counties in the Lehigh Valley region of the eastern portion of the U.S. state of Pennsylvania. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie, Reading, and Scranton.
McKean County is a rural county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 43,450. Its county seat is Smethport. The county was created in 1804 and later organized in 1826. It was named in honor of former Pennsylvania Governor and Declaration of Independence signer Thomas McKean. McKean County comprises the Bradford, PA Micropolitan Statistical Area. It is located in a sparsely populated region known as the Pennsylvania Wilds, including the Allegheny National Forest and borders New York.