The pie chart below summarizes the sources of energy in the United States and their corresponding percentages:  How many variables are summarized in this pie chart? What percentage of the sources of energy in the United States are from either Renewable Energy or Nuclear? What percentage of the sources of energy in the United States are other than Coal? If 1000 sources of energy were randomly chosen, what is the expected number from Petroleum?

The time it takes a student to walk from one end of the campus to the other is normally distributed with a mean of 27.9 minutes and a standard deviation of 3.6 minutes. What is the probability that the time it takes a student to walk across campus is greater than 30?

Please note that this question consists of three parts. Show all your work/explanation. Just giving the answer without adequate work/explanation may result in zero for the question.  A used car dealership posts cars for sale on their website. 85% of the cars have automatic transmission, 20% are all-wheel drive, and 15% have both features. A car is randomly chosen from this website.  Are having these two features (automatic transmission and all-wheel drive), mutually exclusive? Explain using the appropriate probability(ies).  What is the probability that it has neither of these features? If a car has automatic transmission, what is the probability that it is an all-wheel drive?   

In a Statistics class, 5% of the students received an “A” (93 or above) in the course. In this setting, the value “93” is known as 

What do the local authorities represent in contrast to Chigurh’s violent code?

How can the film be interpreted as a warning about eroding civic institutions in Texas?

What happens to Llewelyn Moss before Ed Tom Bell can protect him?

What does the violence in the film metaphorically suggest about unchecked power in decentralized government systems like Texas?

If n = 10 and ∏ = 0.70, then the standard deviation of the binomial distribution is

If you roll a 6-sided die: Event A = numbers 1,2,3,4; Event B = 4,5,6.  Events A and B are _____________.