Question

The weight of items produced by a machine is normally distributed with a mean of 8 ounces and a standard deviation of 2 ounces. refer to exhibit 6-5. what is the probability that a randomly selected item will weigh more than 10 ounces?

Answer 1

Roughly 16% of a normal distribution is more than 1 standard deviation above the mean. (Empirical rule.)

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My probability app says the probability is 0.15866.