Reworked ch4.2
Merge pull request #17 from clarkfitzg/master

Reworked ch4.2
correct and enhance ch3 applied questions

relative error in 8aii) was referring to independent var
12b) and 12c) needs +0 to fit through origin
Added a new example to 12c) to illustrate other situations this fit
could be generated
13a) chas is a factor variable, so translated it to one. This affects
whether it is significant
15b) no need to ignore the independent var, this is done automatically
Solutions to Ex 6: 3

Change-Id: Ief1d875b11203f97212d2ef26ea438e69718ac8b
Solutions to Ex 6: problem 5

Change-Id: I8f5bb59f9057deda78ba2e2197f12da2e8db181b
Chapter 6: Ex 4

Change-Id: I925f6be67bd8d3e6af74f93050fa01fd26579efe
Exercise 6: Problem 6

Change-Id: I0e01a1fb026e04945d3b7812b13fc0d64d5cf373
Answer to problem 5: d (difficult problem)

Change-Id: I75d0eea53a407dc18082daabcd3c5d81f15476c8
Fixing chapter 5 answers - 3.b.ii, 5.b, 5.c, 5.d
Merge pull request #22 from sjuvekar/master

Solutions to Chapter 6: Exercise 3, 4, 5 and 6
Merge pull request #23 from justmarkham/master

Fixing chapter 5 answers - 3.b.ii, 5.b, 5.c, 5.d
Solutions to chapter 6: R exercises 8 and 9

Change-Id: I112c7d6032d872ac0d01ab93c3632f8ddb8b51e2
Fixes #21 ch5 e8, p=2
Merge pull request #26 from asadoughi/issue_21

Fixes #21 ch5 e8, p=2
Merge pull request #24 from sjuvekar/master

Solutions to chapter 6: R exercises 8 and 9
Bug in Chapter 6: Excercise 5(d).. Basically changing lambda to s. And also solutions to Chapter 6: Excercise 9 as promised
Merge pull request #28 from sjuvekar/master

More chapter 6 exercises
Chapter 7: Exercise 6, 9, 10 and 11
Fix answer to Chapter 3 - Exercise 4 (c)-(d)

The training RSS is going to be lower for the more flexible model
b/c it better follows points and absorbs deviations due to epsilon.
Look at Figure~2.9 for the traning MSE
Merge pull request #31 from ksamdev/ch3/ex4

Fix answer to Chapter 3 - Exercise 4 (c)-(d)