Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

http://i.stack.imgur.com/LZPmN.png

My concern is what does s represent on the equation i circled?Is it the amount of Penalty he received or the number of ticket Harry get in order to achive 50 dollars of penalty? "s" raise to 50 power doesn't make sense to me, wouldn't the output would be very large if the s is equal to 2?

share|improve this question
    
So far as I can see, it’s simply the indeterminate in the probability-generating function. –  Brian M. Scott Feb 20 '13 at 2:43
add comment

1 Answer

up vote 1 down vote accepted

That appears to be the variable for the generating function. This is defined to be $$m_X(t) = E(e^{tX}).$$ It appears he is using $s$ instead of $t$.

share|improve this answer
    
Appreciate, and appreciate again :) –  Victor Feb 20 '13 at 3:23
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.