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#21




Frankie,
The level of difficulty is variable, but I think, on average, these questions are about the same level as actual exam questions. Sam Broverman 
#22




May 1 Question

#23




February 13th question
Hi,
I agree with your solution up to the point ln (n) < 4.605. However if the max integer value of n is as the solution says 100, then ln(n) = 4.605170186 which is greater than 4.605. So shouldn't n really be 99? Thanks, Greg 
#24




Greg,
You are right. Based on the Exam C ChiSquare table value of 9.210 , we get n < 99.99 , so the max n should have been 99. I chose numbers that cut the inequality too close. I'll post a correction. Thanks for mentioning that. SB 
#25




May 8 Question

#26




I am a bit confused why for the final answer you put f '(0) = .8. I thought we were asked to find the natural cubic spline so wouldn't we in fact need three functions there in terms of x?
Thanks, Greg R. 
#27




What I meant was to ask for was f'(0) .
I have posted a revised version of the question. SB 
#28




About May 8
the question has not pointed out that we must use natural cubic spline!
hence i can use interpolation polynomials, and i work it out that f(x) = x^3  x (it fits the sample well ) so f'(0)=1. doesn't it make sense? thanks 
#29




Sherri,
Your answer makes sense. My revision to the question doesn't make sense. When I revised the question, somehow I deleted the part of the question indicating that it is a natural cubic spline that is to be found. I'll revise the revision shortly. Thanks for pointing that out. Sam Broverman 2brove@rogers.com 
#30




May 15 Question
You can find the question at:
http://www.sambroverman.com/may15c.pdf Good luck to all taking the exam. I will resume posting questions of the week in a month or so. Sam Broverman 2brove@rogers.com 
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