RHIT Healthcare Statistics and Analytics 4

Question 1

Which statistic measures the spread or variability of a dataset and is calculated as the average of squared deviations from the mean?

Accepted Answer

Variance

Answer

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?

Accepted Answer

The case requires more resources and generates higher reimbursement

Answer

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?

Accepted Answer

There is a 3% probability the observed result occurred by chance if the null hypothesis were true

Answer

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?

Accepted Answer

Six Sigma

Answer

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?

Accepted Answer

5.0 days

Answer

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.

RHIT - Registered Health Information Technician Practice Test

RHIT - Registered Health Information Technician Practice Test

RHIT Healthcare Statistics and Analytics 4