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Guo′s Manuals SOA exam C-ASA北美精算师考试
Deeper Understanding, Faster Calculation
--Exam C Insights Shortcuts
6th Edition
by Yufeng Guo
Fall 2009
The Missing Manual
This electronic book is intended for individual buyer use for the sole purpose of preparing for
Exam C. This book can NOT be resold to others or shared with others. No part of this publication
may be reproduced for resale or multiple copy distribution without the express written permission
of the author.
© 2009, 2010 By Yufeng Guo
Guo Fall 2009 C, Page 1 / 284
Table of Contents
Introduction 4
Chapter 1 Doing calculations 100% correct 100% of the time.. 5
6 strategies for improving calculation accuracy 5
6 powerful calculator shortcuts 6
#1 Solve ax2 + bx + c = 0 . 6
#2 Keep track of your calculation 10
#3 Calculate mean and variance of a discrete random variable 21
#4 Calculate the sample variance 29
#5 Find the conditional mean and conditional variance 30
#6 Do the least squares regression 36
#7 Do linear interpolation 46
Chapter 2 Maximum likelihood estimator 52
Basic idea 52
General procedure to calculate the maximum likelihood estimator 53
Fisher Information 58
The Cramer-Rao theorem 62
Delta method 66
Chapter 3 Kernel smoothing 75
Essence of kernel smoothing 75
Uniform kernel 77
Triangular kernel 82
Gamma kernel 90
Chapter 4 Bootstrap 95
Essence of bootstrapping 95
Recommended supplemental reading 96
Chapter 5 Bühlmann credibility model 102
Trouble with black-box formulas 102
Rating challenges facing insurers 1
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