# Question: The following table provides a probability distribution for the random

The following table provides a probability distribution for the random variable x.

x f(x)

3 .......... .25

6 .......... .50

9 .......... .25

a. Compute e(x), the expected value of x.

b. Compute σ2, the variance of x.

c. Compute σ, the standard deviation of x.

x f(x)

3 .......... .25

6 .......... .50

9 .......... .25

a. Compute e(x), the expected value of x.

b. Compute σ2, the variance of x.

c. Compute σ, the standard deviation of x.

**View Solution:**## Answer to relevant Questions

The number of students taking the SAT has risen to an all-time high of more than 1.5 million (College Board, August 26, 2008). Students are allowed to repeat the test in hopes of improving the score that is sent to college ...The J. R. Ryland Computer Company is considering a plant expansion to enable the company to begin production of a new computer product. The company’s president must determine whether to make the expansion a medium- or ...A Gallup Poll showed that 30% of Americans are satisfied with the way things are going in the United States (Gallup website, September 12, 2012). Suppose a sample of 20 Americans is selected as part of a study of the state ...The Troubled Asset Relief Program (TARP), passed by the U.S. Congress in October 2008, provided $700 billion in assistance for the struggling U.S. economy. Over $200 billion was given to troubled financial institutions with ...Delta Airlines quotes a flight time of 2 hours, 5 minutes for its flights from Cincinnati to Tampa. Suppose we believe that actual flight times are uniformly distributed between 2 hours and 2 hours, 20 minutes.a. Show the ...Post your question