NAHQ Exam CPHQ Topic 1 Question 80 Discussion

The median is a measure of central tendency in statistics that represents the middle value of an ordered data set.

Data Set Ordering: To find the median, the data set must first be arranged in ascending or descending order.

Middle Value Identification: The median is the value that divides the data set into two equal parts, with 50% of the data points lying below it and 50% above it. If the number of observations is odd, the median is the middle number; if even, it is the average of the two middle numbers.

Robustness: Unlike the mean, the median is not affected by extreme values (outliers), making it a more robust measure of central tendency in skewed distributions.

NAHQ Study Guide on Statistical Methods in Quality Improvement.

Quality Management in Health Care, Chapter on Measures of Central Tendency.