The following table shows the frequency distribution of infl

The following table shows the frequency distribution of influent biochemical oxygen demand (BOD) in a wastewater treatment plant: Compute the following: P10 (probability that 10% of the time the BOD will be less than this value) P50 P95

Solution

1. P10 = 0.176

bcoz atleast 18 samples will be less than 129 mg/l

2. P50 = 0.48

bcoz atleast 49 samples will be less than 149 mg/l

3. P95 = 0.98

bcoz atleast 100 samples will be less than 229 mg/l