Tell me about a time you used data analysis to influence a business decision.

This question is designed to evaluate the candidate's ability to analyze complex data sets and translate them into actionable insights that drive business outcomes. Interviewers are looking for examples of how the candidate's technical skills in data analysis have directly impacted stakeholder decisions.

Use the STAR method to structure your response. Start by describing the situation and the data you were analyzing. Then, explain the analysis you conducted, the tools you used, and how your findings influenced the decision-making process. For example, 'In my last role, I analyzed sales data using Excel to identify trends that ultimately led to a 15% increase in revenue.'