# Summary Statistics

• ### (This is How) Stats are Like Diamonds

Lyrics © 2016 Lawrence M. Lesser
may sing to the tune of the Beatles' "Lucy in the Sky with Diamonds"

Picture statistics in the newspaper
With context all missing or half summarized;
Somebody chose just who would be surveyed
And the order the items arise.
Stats are each chosen and given a setting, polished and cut for a view:
Look for the angle that reaches your eyes when they're done.

CHORUS: This is how stats are like diamonds,
This is how stats are like diamonds,
This is how stats are like diamonds, ahhh……

Follow the chain of a long calculation
For students who view stats as math mechanized.
But when you tell them "all stats are constructed",
Their eyebrows will rise up so high!

Newspaper numbers appear on page 4, labelled and grouped for display:
Like a nice gem, this story now sparkled, unlike rocks. (Repeat Chorus)

Picture a stat with no error or bias,
Without a confounder that's lurking disguised.
Take care that you see how that stat is presented:
Most jewels have a flaw to apprise. (Repeat Chorus twice)

• ### Central Concepts

Q: Why did the statistics teacher spend far more time on mean and median than on standard deviation and variance?

A: The department chair said to focus on central concepts.

Larry Lesser

• ### The Empassioned Statistician

by Eveline Pye

War-like as the robin, territorial, blooded,
her reputation bleached pencil-pale
to create a sweet-sounding nightingale,
an icon of care in the carnage of Crimea.

No milksop angel offering only
of the lamp sat in the glimmering gloom
classifying the dead, drawing up tables.

The robin’s song is not loud, it has no
fancy trills and whistles; Florence
talked the simple truth of numbers.
Statistics saved a legion of soldiers.

• ### The Art Of Numbers

by Eveline Pye

We talk of beautiful words, art, buildings
when they‘re not part of the natural world.
An x in Algebra is no more abstract than
an idea in philosophy, just more useful.

It can’t be use that makes the difference.
Keats found beauty in a Grecian urn,
surely practical at some stage of its life:
no one is blind to the beauty of symmetry.

We understand Blake’s awe of the tiger’s stripes.
Why not awe at Gaussian curves? Of course,
I know there is no great beauty in a single number,
in a four or a seven or an eight, but it’s the same

with the alphabet. Where is the wonder in a b
or a k or a t? It’s sublime combinations,
relationships between  letters
that create words and sounds we love.

Look. See the numbers shine in my eyes.

• ### Time to Retire

I understand that the average lifespan of a horse is 27 years with a standard deviation of about 4 years.  Thus, it is pretty rare for a horse to live past 40 - but the Guinness Book of World Records says there was one horse named “Old Billy” that used to pull barges up and down canals in England.  That horse was born in 1760 and lived to be 62 years old. I had a medical appointment on my 62nd birthday and the doctor said I was healthy as a horse.  That’s when I decided to slow down.  I want to be healthy as a giant tortoise.

Dennis Pearl

• ### Sondergaard on Data Analytics

Information is the oil of the 21st century, and analytics is the combustion engine.

Peter Sondergaard (1965 - )