'Any time you compare one set of data to another, you need to be sure that they were collected in the same way and under similar conditions. Otherwise you have the proverbial "apples and oranges" problem.' [1]
'Any time you compare one set of data to another, you need to be sure that they were collected in the same way and under similar conditions. Otherwise you have the proverbial "apples and oranges" problem.' [1]