The prediction that he has to make is that "most students like science best".
What is a hypothesis?A hypothesis is a guess that is useful wen we are trying to explain an observation. Thus the main thrust of a hypothesis is that it must be explanatory. It must offer a tool that would guide the experiment. In this case, the research of Carlos is to obtain which school subject his classmates like best.
In order to obtain the school subject that his classmates like best, he has to first of all make the prediction that; "most students like science best".
Learn more about hypothesis:https://brainly.com/question/17173491
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