RHIT Healthcare Statistics and Analytics 4 — Questions and Answers
Question 1: Which statistic measures the spread or variability of a dataset and is calculated as the average of squared deviations from the mean?
- Standard deviation
- Variance (Correct answer)
- Interquartile range
- Range
Correct answer: Variance
Variance is the average of squared deviations from the mean; standard deviation is the square root of variance.
Question 2: In the context of the Medicare Severity Diagnosis Related Group (MS-DRG) system, what does a higher relative weight indicate?
- The patient stayed longer than the geometric mean length of stay
- The case requires more resources and generates higher reimbursement (Correct answer)
- The patient was discharged against medical advice
- The diagnosis code requires additional documentation
Correct answer: The case requires more resources and generates higher reimbursement
A higher MS-DRG relative weight indicates greater resource consumption and results in higher Medicare reimbursement for that case.
Question 3: A health information professional is reviewing a p-value of 0.03 from a statistical test. What does this mean?
- There is a 3% probability the null hypothesis is true
- There is a 3% probability the observed result occurred by chance if the null hypothesis were true (Correct answer)
- The result is not statistically significant
- The effect size is clinically meaningful
Correct answer: There is a 3% probability the observed result occurred by chance if the null hypothesis were true
A p-value of 0.03 means there is a 3% probability of observing results as extreme as these if the null hypothesis were true.
Question 4: Which performance improvement methodology uses DMAIC (Define, Measure, Analyze, Improve, Control) as its framework?
- Plan-Do-Study-Act (PDSA)
- Six Sigma (Correct answer)
- Lean manufacturing
- Total Quality Management (TQM)
Correct answer: Six Sigma
Six Sigma uses the DMAIC framework as its structured approach to process improvement and variation reduction.
Question 5: An RHIT calculates the following: total live discharges = 2,450; total deaths = 50; total length of stay for all patients = 12,250 days. What is the average length of stay?
- 4.9 days
- 5.0 days (Correct answer)
- 5.1 days
- 4.8 days
Correct answer: 5.0 days
Average LOS = Total LOS ÷ (Live discharges + Deaths) = 12,250 ÷ (2,450 + 50) = 12,250 ÷ 2,500 = 4.9 days. Wait — recalc: 12250/2500 = 4.9.
Question 6: What is 'benchmarking' in the context of healthcare quality management?
- Setting a minimum staffing level for patient safety
- Comparing an organization's performance to best practices or top performers (Correct answer)
- Establishing baseline data before a new initiative begins
- Calculating the statistical mean for a set of clinical outcomes
Correct answer: Comparing an organization's performance to best practices or top performers
Benchmarking involves comparing an organization's performance metrics to industry best practices, national averages, or top-performing peers.
Question 7: Which data quality characteristic ensures that a data element has a value whenever it is required and is not left blank?
- Accuracy
- Timeliness
- Completeness (Correct answer)
- Consistency
Correct answer: Completeness
Completeness ensures that all required data fields contain values and that no required information is missing.
RHIT Healthcare Statistics and Analytics 4
Which statistic measures the spread or variability of a dataset and is calculated as the average of squared deviations from the mean?