suppose a batch of metal shafts produced in a manufacturing company have a variance of 2.25 and a mean diameter of 214 inches. if 78 shafts are sampled at random from the batch, what is the probability that the mean diameter of the sample shafts would be less than 213.8 inches? round your answer to four decimal places.

In an ecosystem, marsh snails feed on phytoplankton and painted turtles feed on marsh snails. pollution has resulted in the depletion of phytoplankton. what effect would this situation likely have on the population of marsh snails and painted turtles? as phytoplankton were destroyed, the population of marsh snails would most likely then the population of painted turtles would mostly likely a. 1. increase 2. decrease 3. stay the same b. 1. increase 2. decrease 3. stay the same