CORRECTIONS TO NAIVE DECISION MAKING
T.W.K
¨
ORNER
This correction page (dated 4th February 2010) is based on correc
tions by John Haigh and Robert MacKay to whom many thanks
Page 4, line 3
Reverse inequality sign.
Page 5, line 2
Reverse inequality sign.
Page 6
In (iii) reverse both inequality signs.
Page 15
Second para of section, reverse inequality sign.
Page 53
Exercise 2.4.13, 5th line delete second ‘in’.
Page 65
Fifth line of footnote 23 ‘will be discussed’
Page 67
Example 2.5.16, second displayed inequality should read
Pr
parenleftbiggvextendsingle
vextendsingle
vextendsingle
vextendsingle
X
1
+
X
2
+
· · ·
+
X
n
n

1
vextendsingle
vextendsingle
vextendsingle
vextendsingle
> δ
parenrightbigg
≥
1

ǫ.
Page 69
Let
X
jk
= 1 if
A
k
chooses the
j
th grotto.
Z
=
n
summationdisplay
k
=1
Y
1
X
1
k
+
n
summationdisplay
k
=1
Y
2
X
2
k
+
· · ·
+
n
summationdisplay
k
=1
Y
m
X
mk
.
Page 75
Exercise 2.6.7, line 1. ‘This part requires’
Page 77
Exercise 2.6.10. I fell asleep at the wheel. Should read
I bet a fixed amount
t
. Thus my fortune
X
j
+1
(
t
) after the
j
+ 1th
throw is given by
X
j
+1
(
t
) =
braceleftBigg
X
j
(
t
) +
tu
if the
j
th throw is heads,
X
j
(
t
)

t
if the
j
th throw is tails.
Page 81
Case C should be specified
(iv) In the remaining Case C, when
p
1
u
1
>
1 and
1
u
1
+
1
u
2
+
· · ·
+
1
u
n
>
1
,
show that
Page 155
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 Fall '08
 Groah
 Math, Madrid Metro, Metropolitana di Napoli, Osaka Municipal Subway, Budapest Metro, Deák Ferenc tér

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