Data <u><i><b>is</b> </i></u>used to make inferences about a problem.<br/><br/>or<br/><br/>Data <u><i><b>are</b> </i></u>used to make inferences about a problem.<br/><br/>What is the correct sentence. I have seen both of them. I would really appreciate if a native speaker can comment on this.<br/><br/>Thank you <img class='emoticon' style='Width:19px;Height:19px;' data-delaysrc='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' src='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' alt='Emotion: smile'/><br/>