Before revision: The word data is most often used as a singular mass noun in educated everyday usage.New Oxford Dictionary of English, 1999"...in educated everyday usage as represented by the Guardian newspaper, it is nowadays most often used as a singular."
After revision: The word data is most often used as a singular Collective (or mass noun) in educated everyday usage.New Oxford Dictionary of English, 1999"...in educated everyday usage as represented by the Guardian newspaper, it is nowadays most often used as a singular."