Regional Kendall Test for Trend
       US Geological Survey, 2005

 Data set:  Example RK3a - Regional Kendal test, input type 3           

 The record is  5 years at  17 locations
    beginning in year  1998.

 The tau correlation coefficient is -0.333
     S =    -17.
     z =  -2.027
     p =  0.0427

 The estimated median trend throughout the region
    during years 1998 through 2002 is:

    Change in Y = -0.3500     per year.