givesmevoice said: "That should be "The relevant data are out there for anyone to see." The singular form is "datum.""
Many speakers of Standard English - including me - construe data as singular. If you do a Google search, you'll find style guides out there on both sides of the issue.
For instance, here's the definition at Merriam-Webster. Their two example sentences illustrate the use of data with singular and plural verb agreement:
the data is plentiful and easily available —H. A. Gleason, Jr.
comprehensive data on economic growth have been published —N. H. Jacoby
I also pasted their usage note below. (By the way, I'm not claiming that you won't find sources that agree with you; the note below states as much. I'm only pointing out that there's no definitive answer here.)
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Is data singular or plural?
Data leads a life of its own quite independent of datum, of which it was originally the plural. It occurs in two constructions: as a plural noun (like earnings), taking a plural verb and plural modifiers (such as these, many, a few) but not cardinal numbers, and serving as a referent for plural pronouns (such as they, them); and as an abstract mass noun (like information), taking a singular verb and singular modifiers (such as this, much, little), and being referred to by a singular pronoun (it). Both constructions are standard. The plural construction is more common in print, evidently because the house style of several publishers mandates it.