Mann-kendall trend test example

1. What is Mann-Kendall trend test?
2. How does the Mann-Kendall test work?
3. Why we use Mann-Kendall test?
4. How do you do the Kendall test?

What is Mann-Kendall trend test?

The Mann-Kendall statistical test for trend is used to assess whether a set of data values is increasing over time or decreasing over time, and whether the trend in either direction is statistically significant. The Mann-Kendall test does NOT assess the magnitude of change.

How does the Mann-Kendall test work?

The Mann-Kendall test analyzes the sign of the difference between later-measured data and earlier-measured data. Each later-measured value is compared to all values measured earlier, resulting in a total of n(n-1)/2 possible pairs of data, where n is the total number of observations.

Why we use Mann-Kendall test?

The Mann-Kendall Trend Test (sometimes called the MK test) is used to analyze time series data for consistently increasing or decreasing trends (monotonic trends).

How do you do the Kendall test?

To perform the test, have your patient in a supine position with both legs off the table. Then ask your patient to bring one knee to the chest and hold it. The test is positive if the hanging leg does come up and does not remain at 90° flexion.