It shows how terrible the data treated before the presentation.

1. An
example
of
DATA
alteration
in
a
presentation
for
500+
audiences
Verified
from
original
data.
Kazunori
ANDO

2. Original
data
from
Vade-‐‑‒Retro.
The
presenter
have
same
data
but
didnʼ’t
know
another
one
had
the
same
one.
Date
ISP
name
Sum
of
the
rates=100%
For
each
date,
it
shows
spam
sending
rates
for
15
Japanese
ISPs.

3. A
graph
included
in
the
original
data
from
Vade-‐‑‒Retro(Excel
file)
15
series
(ISPs)

4. Change
graph
type
to
show
sum
of
the
rates
(always
100%
of
course…)

5. Deleted
a
series(ISP)
which
have
the
biggest
average
rate.
This
graph
is
generated
from
original
data
which
I
have…
（Note:
The
height
of
graph
shows
“100%
-‐‑‒
a
deleted
ISP
rate”）
Only
14
series

6. The
graph
in
actual
presentation.
Please
compare
this
and
the
previous
page.

7. Problems
The
Slide
title
didnʼ’t
describe
real
meaning…
-‐‑‒
The
title
is
“How
many
spam
send
from
Japanese
ISPs?”
-‐‑‒
The
original
data
donʼ’t
include
any
number
of
spam.
-‐‑‒
The
presenter
change
the
meaning
of
graph!
The
deletion
of
data
from
original
one.
-‐‑‒
Why
did
he
delete
the
series
which
have
biggest
sending
rate?
-‐‑‒
The
sum
of
rates
are
not
100%...
After
this
presentation,
any
correction
or
apology
from
presenter
is
not
observed.