For me, the best part of digging into data isn’t the prerequisites of gathering, loading, or cleaning the data, but when I actually get to interview the data. Those are the moments when I discover whether the data is clean or dirty, whether it’s complete, and most of all, what story the data can tell. Think of interviewing data as a process akin to interviewing a person applying for a job. You want to ask questions that reveal whether the reality of their expertise matches their resume.

Interviewing is exciting because you discover truths. For example, you might find that half the respondents forgot to fill ...

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