Meeting papers

                                                                 Burgess Creek Monitoring Program
                                                                               Annual Review 2022



5.6 Statistical Comparison of 2020 and 2021 Monitoring Data
Students' t-tests with unequal variances assumed were used to test whether 2021
monitoring data collected at each site were statistically similar or different from the
monitoring data collected in 2020.

Mean water quality data used for statistical analysis amongst 2021 and 2020 calendar
years are in Table 8. This data summarises the results provided within Appendix A -
Summary statistics of nutrient concentrations and microbiological indicators at each
monitoring site and allows easier comparison of the mean values between years.

The p-values generated by the statistical analysis conducted between the 2021 and 2020
data are in Table 8 and Table 9.

Most of the water quality parameters across all monitoring sites demonstrated no
statistically significant difference between 2020 and 2021. Of the 105 statistical tests
conducted, three statistically significant differences (p ≤ 0.05) were found. Of those, two
were a reported increase in concentration from the most recent year's monitoring program.
A summary of the statistically significant differences includes:

 •   Monitoring Site B2

         o    Decrease in the concentration of Total Nitrogen as N;

         o    Increase in pH.

 •   Monitoring Site B5

         o    Increase in Dissolved Oxygen.




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