Question 11

1. When model inputs are uncertain:

   		we should just use the average value for the uncertain input
   		it is usually safe to just ignore the uncertainty
   		we can still develop a model, often by characterizing the uncertainty (variability) by assigning a probability distribution to each uncertain input variable
   		you should just give it up, no model is going to help you

Question 12

1. Once we've assigned probability distributions to the model input, and run the model, we're going to get:

   		a scatterplot
   		a distribution of possible output values
   		tired of the entire business
   		a single output value

Question 13

1. The Excel function =RAND() returns random values uniformly distributed between which of the following?

   		5 and 10
   		-2 and 2
   		0 and 1
   		0 and 10