Marketers often make mistakes when using big data, relying too much on intuition rather than data-driven decisions, and struggling with statistics. A study found that only 11% of decisions are based on data while 44% of marketers got 4 or more statistics questions wrong on a 5 question test. Relying too much on data without the ability to ask the right questions and filter out noise can also be ineffective. To address these issues, marketers need to be comfortable with ambiguity, focus on higher goals, and have the rare ability to filter out noise from data. This will help them make better decisions and understand changing customer requirements.