you examine the temperature in chicago each month for many y

you examine the temperature in chicago each month for many years. do you expect a line of the data to show seasonal variation?

Solution

Yes , I expect a line of the data to show seasonal variation

why?

well, its very simple if you examine the temperature in chicago each month you will have a data ( a number) for each month , and if you continue do this for many years you will have a behavior of the temperature for each seasonal and you will see the variation for each seasonal