I was lking at
this magazine to
chse which
restaurant to
eat at.
What are you
reading? You
like ramen?
They a
lk so
gd, don't
they?
Heo, Rui.
OH!
*The 50 Best Ramen Shops
Heo, Mr.
Yamamoto!
1. Frequency Distribution Tables and Histograms
*
SQUEAK
32 Chapter 2
prices at ramen shops in The 50 Best Ramen Shops
HM.
...
I made a price
chart.
You start the
leon so
suenly.
Weirdo!
scritch
scritch
scritch
Price (¥) Price (¥)Shop Shop
What do you
think about this
table?
I fl like
going out
for ramen.
WHAT?!
You must fl
something
other than that.
But I reay
don't...
We, one thing I
can s is that the
prices vary widely.
But this table is just
a bunch of numbers.
It doesn't mean
anything.
How can we
make this
table more
meaningful?
H.
Maybe you
can make
this into a
graph?
COECT!
To make a graph, we
first must make price
groups.
?
We...
I must?
shops in
The 50 Best Ramen
ce (¥)
Price
Shop
34 Chapter 2
5f
¥900–1000
4f
¥800–900
3f
¥700–800
2f
¥600–700
1f
¥500–600
5 1
8 47
37
38 46
2 8 9
11
19 21 24
31 36
26
30 33
34
39 40
41
49 50
1 6 10 12 15 20 22 23 25
3 4 13 14 16 17 28 35 42
43
44 45
48
7
27 29
32
Flr (Cla)
Equal or greater/
Le than
Suose...
there is a huge
shoing ma
consisting of 50
ramen shops...and
Only ramen shops.
I would go
every day!
Somehow Rui has
turned into an
elevator girl?
Each shop serves
only one type of
ramen,
and the shops are
located on dierent
flrs aording
to the price of their
ramen.
Such a group division
is caed a cla in
statistical terms.
HM.
*PUSH
*
Geing the Big Picture: Understanding Numerical Data 35
Flr
≥ ‹
Shop Name
Cla
midpoint
950
5f
¥900–1000
Flr Guide
850
4f
¥800–900
750
3f
¥700–800
650
2f
¥600–700
550
1f
¥500–600
On each flr,
there is a sign
indicating the
mile price of
each cla.
The second
flr is cla
600–700 yen, so
the display says
650 yen!
This is caed
a cla
midpoint.
Since this shoing
ma places each shop
on a dierent flr
aording to prices, the
number of shops on each
flr varies.
The number of
shops on each
flr is caed
frequency.
That's true.
Now, try calculating
the relative frequency
of shops on the third
flr.
Elevator
girl?
The flr with the
most shops is the
third flr. There
are 18 shops.
4 ON THE first
FLR, 13 ON
THE second
FLR...
h-
h!
36 Chapter 2

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