difference between a data item and the mean of a data set.
B.
most frequently occurring value in a data set.
C.
arithmetic average of a data set.
D.
number thatdivides an ordered data set into two equal parts.
The Answer Is:
D
This question includes an explanation.
Explanation:
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.
[References: (Based on Healthcare Quality NAHQ documents and resources), NAHQ Study Guide on Statistical Methods in Quality Improvement., Quality Management in Health Care, Chapter on Measures of Central Tendency., , =========, , , , ]
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