AHIMA Healthcare Data Analytics 2 — Questions and Answers
Question 1: Which statistical measure is most resistant to outliers when analyzing patient length-of-stay data?
- Mean
- Standard deviation
- Median (Correct answer)
- Variance
Correct answer: Median
The median is the middle value of an ordered dataset and is unaffected by extreme outliers, making it more reliable than the mean for skewed distributions like length of stay.
Question 2: A health analyst groups patients with similar chronic conditions using a clustering algorithm without predefined outcome labels. This is an example of:
- Supervised learning
- Prescriptive analytics
- Time series analysis
- Unsupervised learning (Correct answer)
Correct answer: Unsupervised learning
Unsupervised learning (such as k-means clustering) discovers hidden patterns in data without requiring labeled training examples.
Question 3: FHIR (Fast Healthcare Interoperability Resources) is primarily designed to enable:
- Real-time ICU patient monitoring dashboards
- Standardized exchange of healthcare data via APIs (Correct answer)
- Automated medical coding using AI algorithms
- Encryption of health records stored at rest
Correct answer: Standardized exchange of healthcare data via APIs
FHIR is an HL7 standard that uses RESTful APIs to enable standardized, interoperable exchange of healthcare data between disparate systems.
Question 4: Which of the following is considered a leading indicator in healthcare quality analytics?
- 30-day readmission rate
- Patient mortality rate
- Hand hygiene compliance rate (Correct answer)
- Average length of stay
Correct answer: Hand hygiene compliance rate
Hand hygiene compliance is a process (leading) indicator that predicts future outcomes like infection rates, unlike readmission or mortality, which are lagging outcome measures.
Question 5: The primary purpose of a data dictionary in a health information system is to:
- Control patient access permissions in the EHR
- Manage physical database server configurations
- Define the structure, format, and meaning of each data element (Correct answer)
- Store encryption keys for protected health information
Correct answer: Define the structure, format, and meaning of each data element
A data dictionary is a metadata repository that documents the definition, format, source, and relationships of each data element to ensure consistent interpretation and use.
Question 6: Which chart type is BEST suited for displaying a trend in monthly hospital admission rates over a two-year period?
- Pie chart
- Scatter plot
- Box plot
- Line chart (Correct answer)
Correct answer: Line chart
Line charts are designed to display continuous data trends over time, making changes and patterns in monthly admission rates easy to identify and interpret.
Question 7: In healthcare analytics, 'data granularity' refers to:
- The security classification level assigned to a dataset
- The number of data sources feeding into a data warehouse
- The level of detail at which data is captured or stored (Correct answer)
- The frequency at which scheduled data backups occur
Correct answer: The level of detail at which data is captured or stored
Data granularity describes how detailed the data is—patient-level data has higher granularity than aggregated facility-level summaries.
AHIMA Healthcare Data Analytics 2
Which statistical measure is most resistant to outliers when analyzing patient length-of-stay data?