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<br />003481 <br /> <br />Correlation coefficients relating the number of storms to recorded <br />water content each year for the four mountainous sub-regions appear in <br />the left-hand side of Table 6. Coefficients are all positive--ranging <br />from .43 in the north sub-region to .62 in the east central. The <br />coefficient in the north appears to have been attenuated by the low <br />number of storms during 1973-74. p-values range from .02 to .14. All <br />these values (except .14 for the north sub-region) are in the range of <br />cut-off criteria commonly accepted by statisticians as reasonable <br />evidence of non-chance relationship. These cutoff criteria are often <br />referred to as levels of statistical significance. <br /> <br />TABLE 6 <br />Correlations and p-values for the number of storms and seedable events <br />and long-term maximum spring snowcourse water content for mountainous <br />sub-t'egions of Colorado" <br /> <br /> Number of <br /> Number of Storms Seedable Events <br /> Correlation Correlation <br />Sub-region Coefficient p-value Coefficient p-value <br />North .43 (.14) .44 (.13) <br />South .51 (.08) .33 (.27) <br />East Central .62 (.02) .33 (.27) <br />West Central .55 (.05) .34 (.26) <br />Combined .60 ( .03) .42 (.16) <br /> <br />"P-values refer to the probability that a correlation coefficient as <br />large or larger than that given could have occurred by chance alone. <br /> <br />'Ihese correlation coefficients indicate that the number of storms <br />tends to increase in wetter years. 'Ihe strength of this relationship, <br />however, is only weak to moderate. That more storms tend to occur in <br /> <br />22 <br />