The output from a sewage treatment plant is constantly monitored to assess treatment efficacy. suppose that the mean coliform content is 20 bacteria/ml with a standard deviation of 4 bacteria/ml. an automatic measuring device is being used to monitor the bacterial levels. an alarm should ring whenever the bacterial level exceeds the 97.5th percentile. the upper bound should be:

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.