Kendall's tau Correlation Test
       US Geological Survey, 2005

 Data set:  Example MK4a - Mann-Kendall test, input type 4              

 The tau correlation coefficient is -0.053
     S =   -168.
     z =  -0.694
     p =  0.4874

 The relation may be described by the equation:

    Y =  7467.4     +   -3.545     * X