You are given the following information regarding a random variable:

P(1 x <= 5) is equal to:

A manufacturer of light bulbs claims that the distribution of the light bulb life span has a mean of 60 hours and a standard deviation of 4 hours. The competition decides to check this claim by purchasing 30 light bulbs and testing them to determine the life span of the light bulbs. If the manufacturer's claim is true, how will the sampling distribution of the 30 light bulbs compare to the reported population distribution?

An investor is currently considering the choice between a corporate and a municipal bond. The yield on these two bonds is given below.
Securities: Yield 10-year corporate bond: 13.25 10-year municipal bond: 8.50
The investor's marginal tax rate is 34%. Which bond provides a higher after-tax yield for this individual investor?

A firm should cease to do business when:

The Dow Jones Industrial Average is an example of