How do you handle unexpected findings or outliers in your data analysis?

INTERMEDIATE LEVEL
How do you handle unexpected findings or outliers in your data analysis?
Sample answer to the question:
When I encounter unexpected findings or outliers in my data analysis, I first take a step back to evaluate the data quality and ensure that there are no errors or anomalies. If everything checks out, I dig deeper to understand the reasons behind the unexpected findings. This often involves consulting with domain experts or conducting additional research to gain more insights. Once I have a clear understanding of the situation, I explore different approaches to address the outliers. This may involve applying different statistical techniques or data manipulation methods to normalize the data or identify any underlying patterns. I also consider the context and the potential impact of these outliers on the overall analysis. Finally, I document my findings and any actions taken to handle the outliers, so that they can be reviewed and validated by others if needed.
Here is a more solid answer:
When encountering unexpected findings or outliers in my data analysis, I follow a systematic approach to ensure accurate and meaningful insights. Firstly, I meticulously review the quality of the data to rule out any errors or inconsistencies. If the data is reliable, I investigate the outliers further to understand their underlying causes. This includes consulting with subject matter experts or conducting additional research to gain domain-specific insights. Once I have a comprehensive understanding, I explore various statistical techniques or data manipulation methods to address the outliers appropriately. For example, I might employ robust statistical measures or apply data transformations to normalize the data and mitigate the impact of outliers on the analysis. Moreover, I consider the context and evaluate the potential influence of outliers on the overall findings. This enables me to make informed decisions on whether to exclude outliers or adjust the analysis accordingly. Finally, I document my findings and the actions taken, ensuring transparency and facilitating peer review if necessary.
Why is this a more solid answer?
The solid answer goes into more detail about the candidate's approach to handling unexpected findings or outliers in data analysis. It includes specific steps taken, such as reviewing data quality, consulting with experts, and employing statistical techniques. It also mentions the consideration of contextual factors and documentation of findings. However, it could further improve by providing examples of past experiences where the candidate successfully applied this approach.
An example of a exceptional answer:
Encountering unexpected findings or outliers in my data analysis is an opportunity for me to dive deeper and uncover valuable insights. To effectively handle such situations, I follow a rigorous and comprehensive process. Firstly, I conduct a thorough data quality assessment to ensure the reliability of the analysis. Once confirmed, I employ advanced statistical techniques to understand the outliers' causes and their potential impact on the analysis. This involves employing exploratory data analysis methods, such as box plots or scatter plots, combined with domain-specific knowledge and on-going collaborations with subject matter experts. An exceptional example of handling outliers was during my work as a Clinical Data Analyst at XYZ Hospital. I encountered an unexpected spike in blood pressure readings for a group of patients in a specific unit. After investigating further, I discovered a faulty blood pressure monitor that was responsible for the outlier readings. I collaborated with the IT department to rectify the issue and re-analyzed the data, which revealed the true patterns and trends in blood pressure within the unit. This example showcases my ability to identify and address outliers, leading to accurate and actionable insights. In addition, I always consider the clinical relevance and the potential implications of outliers on patient care and outcomes. This ensures that my analysis and recommendations are robust and impactful. Throughout the process, I maintain thorough documentation of my findings, methodologies, and any corrective actions taken to ensure transparency and reproducibility.
Why is this an exceptional answer?
The exceptional answer includes specific examples from the candidate's past experiences, highlighting their ability to handle unexpected findings or outliers in data analysis. It demonstrates a comprehensive process that goes beyond basic statistical techniques and emphasizes the importance of domain-specific knowledge and collaborations with subject matter experts. Furthermore, it showcases the candidate's ability to identify and resolve issues that contribute to outliers, leading to accurate and actionable insights. The inclusion of a real-life example of identifying and rectifying a faulty blood pressure monitor adds credibility and showcases the candidate's problem-solving skills. However, the answer could be further enhanced by providing additional examples or elaborating on how the candidate communicated their findings to stakeholders.
How to prepare for this question:
  • Review different statistical techniques and data manipulation methods commonly used in data analysis.
  • Familiarize yourself with the healthcare data standards and terminologies to understand the context of clinical data.
  • Practice applying statistical techniques to identify outliers and analyze their impact on the overall analysis.
  • Develop strong collaboration and communication skills to effectively work with domain experts and convey findings to non-technical stakeholders.
  • Stay updated with the latest advancements in data analysis tools and software (e.g., SAS, SPSS, R, SQL) to leverage their capabilities in outlier detection and handling.
What are interviewers evaluating with this question?
  • Data analysis and manipulation
  • Statistical analysis
  • Knowledge of healthcare data standards
  • Familiarity with EHR and clinical databases
  • Proficient in data analysis tools such as SAS, SPSS, R, or SQL

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