Marvel Studios' world premiere of "Captain Marvel" was held at El Capitan Theatre in Los Angeles on March 4.
Marvel Studios' world premiere of "Captain Marvel" was held at El Capitan Theatre in Los Angeles on March 4. - 
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The new action movie "Captain Marvel" hits theaters today. Some analysts have spent months predicting how well the film might do. Box Office Media, a company which projects and tracks opening numbers, expects the superhero movie could bring in more than $160 million dollars in its first weekend. But just how do box-office tracking companies make these predictions well before anybody sets foot in a movie theater?

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Follow Renata Sago at @renatasago