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P-Value = Probability that an observed pattern of increases or decreases over time is <br /> not a trend. <br /> To refect Ha, the probability corresponding to the Z value (corrected for <br /> ties) must be less than the specified a value The smaller the probability <br /> value, the greater the probability is that a trend is occurring, and the <br /> greater likelihood that time (the independent variable) can be used to <br /> predict the volatile organic compound or inorganic concentration (the <br /> dependent variable). <br /> In this example, P = 0 0147 (corrected for ties) This value is small and is <br /> <0 05, the a value Therefore, we can refect H,, of no trend and determine <br /> that an upward trend is occurring <br /> i <br /> • <br /> sAC\N NPJ2\2794\27941000 1 CS-98\pnismer6 Emcon <br /> D-4 Rev 0,7/22198 <br />