Model Form #1
log10(ECB) =
4.2185 - 4.4371 log10(TURB)
+ 2.0698 (log10(TURB))2
- 0.1209 sin(2π D / 365)
+ 0.225 cos(2π D / 365)
where:
- ECB is computed e. coli, in most probable number
- TURB is turbidity, in formazin nephelometric units
- D is day of year, in the range of integers 1 through 365
Model Calibration
Basic Data
| Number of measurements: | 44 |
|---|---|
| Mean squared error: | 0.150544 |
| Multiple R2: | 0.7968 |
| Bias correction (smearing) factor: | 1.4893 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | 4.2185 | 1.0253 | log10(TURB) | -4.4371 | 1.4594 | (log10(TURB))2 | 2.0698 | 0.4939 | sin(2π D / 365) | -0.1209 | 0.0779 | cos(2π D / 365) | 0.225 | 0.0889 |
Correlation Matrix
| Intercept | log10(TURB) | (log10(TURB))2 | sin(2π D / 365) | cos(2π D / 365) | |
|---|---|---|---|---|---|
| Intercept | 1 | -0.9929 | 0.9752 | -0.0179 | -0.3501 |
| log10(TURB) | -0.9929 | 1 | -0.9939 | -0.0012 | 0.3715 |
| (log10(TURB))2 | 0.9752 | -0.9939 | 1 | 0.0149 | -0.3929 |
| sin(2π D / 365) | -0.0179 | -0.0012 | 0.0149 | 1 | -0.0248 |
| cos(2π D / 365) | -0.3501 | 0.3715 | -0.3929 | -0.0248 | 1 |