Mathematics, 03.04.2020 20:03, xxiigiddy18

The amount of a particular impurity in a batch of a certain chemical product is a random variable with mean value 4.0 g and a standard deviation 1.2 g. If 40 batches are independently prepared, what is the (approximate) probability that the sample average amount of impurity X is between 3.5 and 3.8 g

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The amount of a particular impurity in a batch of a certain chemical product is a random variable wi...