CPHQ Health Data Analytics 2

Question 1

Which statistical measure is most appropriate for describing the central tendency of highly skewed healthcare cost data?

Accepted Answer

Median

Answer

The median is preferred for skewed distributions because it is not influenced by extreme outliers, which are common in healthcare cost data.

Question 2

A hospital wants to compare its catheter-associated urinary tract infection (CAUTI) rate to national benchmarks. Which data source provides the most appropriate national comparison?

Accepted Answer

The National Healthcare Safety Network (NHSN)

Answer

NHSN is the CDC's surveillance system specifically designed for tracking healthcare-associated infections and provides standardized national benchmarks.

Question 3

What does a run chart's 'shift' signal rule require to indicate a non-random pattern?

Accepted Answer

7 or more consecutive points on one side of the median

Answer

A shift is defined as 7 or more consecutive data points on the same side of the median, indicating a non-random pattern likely due to a special cause.

Question 4

In regression analysis applied to quality improvement, what does an R-squared value of 0.85 indicate?

Accepted Answer

85% of the variation in the outcome is explained by the predictor variables

Answer

R-squared (coefficient of determination) represents the proportion of variance in the dependent variable that is predictable from the independent variables.

Question 5

Which data collection method introduces the most potential for Hawthorne effect bias?

Accepted Answer

Direct observation of clinical staff

Answer

Direct observation is most susceptible to the Hawthorne effect, where subjects alter their behavior because they know they are being watched.

CPHQ - Certified Professional in Healthcare Quality Practice Test

CPHQ - Certified Professional in Healthcare Quality Practice Test

CPHQ Health Data Analytics 2