Informatics Nurse Test Nursing Informatics Data Analytics and Outcomes 2 — Questions and Answers
Question 1: A type II error in clinical research means:
- Finding a difference that does not truly exist (false positive)
- Failing to detect a true difference that actually exists (false negative) (Correct answer)
- Using the wrong statistical test
- Enrolling too many patients in a study
Correct answer: Failing to detect a true difference that actually exists (false negative)
A Type II error (beta error) is a false negative — the study fails to detect a real effect, often due to insufficient sample size.
Question 2: In clinical data analytics, 'data normalization' refers to:
- Encrypting sensitive fields
- Restructuring data to eliminate redundancy and ensure consistent formatting (Correct answer)
- Converting all data to a single file format
- Removing outliers from datasets
Correct answer: Restructuring data to eliminate redundancy and ensure consistent formatting
Normalization organizes data to reduce redundancy and ensure that fields are structured consistently, improving data integrity and query performance.
Question 3: Which statistical measure describes the spread of patient outcome data around the mean?
- Median
- Mode
- Standard deviation (Correct answer)
- Range percentile
Correct answer: Standard deviation
Standard deviation quantifies the average dispersion of data points around the mean, indicating how much patient outcomes vary from the average.
Question 4: A nursing informatics team is using regression analysis on EHR data. The PRIMARY use of this analysis is to:
- Describe the current state of outcomes
- Identify relationships between variables and predict outcomes (Correct answer)
- Sort data alphabetically
- Encrypt patient records
Correct answer: Identify relationships between variables and predict outcomes
Regression analysis models the relationship between predictor variables and an outcome, enabling prediction and identification of contributing factors.
Question 5: The concept of 'data provenance' in nursing informatics refers to:
- The physical location of data servers
- The documented origin, history, and chain of custody of data (Correct answer)
- Regulatory compliance status of data systems
- The format in which data is stored
Correct answer: The documented origin, history, and chain of custody of data
Data provenance tracks where data originated, how it was collected, and how it has been transformed, ensuring traceability and trustworthiness.
Question 6: An informatics nurse is reviewing hospital-acquired infection (HAI) data using a run chart. A run of 8 or more consecutive points on one side of the median indicates:
- Random variation requiring no action
- A non-random shift in the process warranting investigation (Correct answer)
- Data entry errors in the EHR
- Normal seasonal fluctuation
Correct answer: A non-random shift in the process warranting investigation
Eight or more consecutive data points on one side of the median is a run chart signal indicating a non-random shift in the process that should be investigated.
Informatics Nurse Test Nursing Informatics Data Analytics and Outcomes 2
A type II error in clinical research means: