Standard units with 55 or 100 gallon tanks. Relief valve adjustable between 50-125 psi. Steep pump curve allows for pressure settings up to 100 psi. Adjustable pressure switch with 30-150 psi set point range, 5-30 psi dead band and visible range scale.
Zestimates: Improving accuracy. Zillow says Zestimates currently have a median error rate of 8%. That may seem to be a large margin â but it has improved. The algorithm began with a 13.6% median error rate in 2006, according to Zillow. However, error rates can vary widely, depending on where you live.
One approach for calculating an average bioburden estimate for the case described above is based upon the Poisson Distribution. The total number of CFU observed for aerobes for a given product batch was zero. The 95% upper confidence limit (UCL) for an observation of zero, using the Poisson Distribution, is 3. For each product batch, with a dilution factor of 3, the calculated average bioburden estimate would be (3/10)*3 or 0.9 CFU. If this approach were applied to all of the results for aerobes, taking into account all three batches of product, the calculation would be (3/30)*3 or 0.3 CFU.