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. 2004 Jul;70(7):4276–4285. doi: 10.1128/AEM.70.7.4276-4285.2004

TABLE 2.

Linear regression of insolation and log E. coli concentrations in lake watera

Result for date (mo/day/yr) Result at water depth:
45 cm
90 cm
R B SE β t Significance R B SE β t Significance
6/12/00
    Intercept 3.561 0.241 14.777 0.000 3.184 0.271 11.742 0.000
    Insolation (MJ/m2) −0.648 −1.24 0.552 −0.648 −2.248 0.059 −0.532 −1.032 0.621 −0.532 −1.662 0.140
7/11/00
    Intercept 3.346 0.067 50.089 0.000 3.227 0.056 57.162 0.000
    Insolation (MJ/m2) −0.945 −0.336 0.044 −0.945 −7.666 0.000 −0.971 −0.395 0.037 −0.971 −10.657 0.000
7/24/00
    Intercept 2.071 0.099 20.96 0.000 2.135 0.094 22.74 0.000
    Insolation (MJ/m2) −0.674 −0.106 0.044 −0.674 −2.414 0.046 −0.935 −0.289 0.042 −0.935 −6.952 0.000
8/01/00
    Intercept 2.179 0.089 24.454 0.000 2.071 0.085 24.34 0.000
    Insolation (MJ/m2) −0.434 −0.08 0.063 −0.434 −1.274 0.243 −0.524 −0.097 0.06 −0.524 −1.629 0.147
8/07/00
    Intercept 4.094 0.257 15.92 0.000 3.552 0.254 13.99 0.000
    Insolation (MJ/m2) −0.897 −0.675 0.126 −0.897 −5.359 0.001 −0.898 −0.673 0.124 −0.898 −5.411 0.001
8/16/00
    Intercept 3.624 0.095 38.088 0.000 3.29 0.119 27.701 0.000
    Insolation (MJ/m2) −0.976 −0.554 0.046 −0.976 −11.919 0.000 −0.943 −0.436 0.058 −0.943 −7.512 0.000
9/18/00
    Intercept 2.337 0.081 28.791 0.000 2.107 0.075 28.237 0.000
    Insolation (MJ/m2) −0.918 −0.191 0.031 −0.918 −6.115 0.000 −0.931 −0.194 0.029 −0.931 −6.75 0.000
9/25/00
    Intercept 2.067 0.078 26.378 0.000 1.788 0.095 18.781 0.000
    Insolation (MJ/m2) −0.292 −0.119 0.148 −0.291 −0.806 0.447 −0.082 −0.039 0.18 −0.082 −0.217 0.835
a

Note that only 8 of the 10 sampled days are represented: pyrenometer readings were unavailable on 25 May and 26 June. Significant relationships are in bold.