Q1
 
On Q1(a) " Google a little .....about rates being larger or smaller
> than 2 cases per THOUSAND" Shouldn't the rate be 2 cases per 100,000. ?

yes,

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Q2

 On Q2, the example shown in class was "fatal accident" with mean = 50
 and variance = 40^2. Can we use the same assumption when calculating
 passenger death?

If you look at the table with the data, you can see that the numbers are
very different for
deaths and fatal accidents... I think it does not make sense to assume the
same prior... way off.

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Q3

Q

 when u said use R to check, it seems to me that this is just
 following the codes shown on last page of outline5, do I need to do
 anything more than that?
A 

The last code of the posted outline 5, only give some values of the
density. You have to take the difference and find out for how many values
one is bigger than the other.. The example is in the textbook...

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Q
 In problem 3 of this homework, just to remind you that Pr(Y1>y2|...) should be about
0.48, instead of 0.22. My answer is the same as in Hoff's book.
And as you indicated in your lecture notes, we could get the same result by
>mean(Y1>Y2)


A Yes, but it is nice to obtain the density of the difference to be able to calculate other 
quantities and to see the posterior interval plotted on it, etc... 

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Q5

Question: I had a question regarding Homework 2, Problem 5(b). I feel like I'm missing something. Have we learned how 
to sample from the posterior density when we don't know the explicit name of the distribution?

Answer: 
  I should have removed the last two questions. Thanks for noticing. 
I was not expecting you to answer (b) (c). I am teaching you how to draw random numbers from 
a distribution created with a grid this coming week. 

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