Data is or data are?
The word 'data' is used with both singular and plural verbs so:
The data is = is correct
The data are = is correct.
Some people will tell you that ONLY 'the data are' is correct. This is because the word data is a Latin word and in Latin it is a plural verb. But in English usage both are common.
I checked out the usage in Lextutor by searching for data is and data are and you can too here: https://www.lextutor.ca/conc/eng/
If you don't believe me then list to Scott Thornbury talking about it here: