Proof 2=1

[Martin Holt-3]

 Xmas draws nearer!

For  young statisticians...some festive fun

Proof that  2 = 1

a = b

a² = a.b

a² + a² = a.b + a²

2a² = a.b + a²

2a² – 2ab = a.b + a² – 2ab

2a² – 2ab = a² – a.b

2(a² – a.b) = a² – a.b

Dividing through by (a² – a.b) gives 2=1

Q.E.D.

Martin P. Holt

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

[Mathew Chandler-2]

But you are dividing by zero which is a no no when you divided by (a² – a.b) since a = b

 

 

Mathew Chandler
Computing Consultant-BSS
I.T. Services
University of Windsor
Windsor, Ontario, Canada
N9B 3P4
[phone] ext. 2768
[hidden email]

 

"Beware of false knowledge;

it is more dangerous than ignorance."

George Bernard Shaw
 

 

From: SPSSX(r) Discussion [[hidden email]] On Behalf Of Martin Holt
Sent: December 11, 2018 11:54 AM
To: [hidden email]
Subject: Proof 2=1

 

 Xmas draws nearer!

 

 

For  young statisticians...some festive fun

Proof that  2 = 1

a = b

a² = a.b

a² + a² = a.b + a²

2a² = a.b + a²

2a² – 2ab = a.b + a² – 2ab

2a² – 2ab = a² – a.b

2(a² – a.b) = a² – a.b

Dividing through by (a² – a.b) gives 2=1

Q.E.D.

 

Martin P. Holt

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

[Mike]

This is a somewhat old chestnut, so let me provide a novel conundrum.

Consider:

A person reports the result of a correlational analysis and only reports

the valuw od r^2.  There are no scaterplots, no raw data, nthing except

the "effect size" measure r^2.

Question:  What is the value of the Pearson r?

A better question is "how values of Pearson r are there and how do you

choose which one to use if no additional info is provided?" ;-)

-Mike Palij

New York University

[hidden email]

P.S.  I'm getting well again.

On Tue, Dec 11, 2018 at 11:54 AM Martin Holt <[hidden email]> wrote:

 Xmas draws nearer!

For  young statisticians...some festive fun

Proof that  2 = 1

a = b

a² = a.b

a² + a² = a.b + a²

2a² = a.b + a²

2a² – 2ab = a.b + a² – 2ab

2a² – 2ab = a² – a.b

2(a² – a.b) = a² – a.b

Dividing through by (a² – a.b) gives 2=1

Q.E.D.

Martin P. Holt

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

[Martin Holt-3]

Spot on, Mathew!

Martin P. Holt

 

---

From: Mathew Chandler <[hidden email]>
To: [hidden email]
Sent: Tuesday, 11 December 2018, 22:23
Subject: Re: Proof 2=1

But you are dividing by zero which is a no no when you divided by (a² – a.b) since a = b

 

 

Mathew Chandler
Computing Consultant-BSS
I.T. Services
University of Windsor
Windsor, Ontario, Canada
N9B 3P4
[phone] ext. 2768
[hidden email]

 

"Beware of false knowledge;

it is more dangerous than ignorance."

George Bernard Shaw
 

 

From: SPSSX(r) Discussion [[hidden email]] On Behalf Of Martin Holt
Sent: December 11, 2018 11:54 AM
To: [hidden email]
Subject: Proof 2=1

 

 Xmas draws nearer!

 

 

For  young statisticians...some festive fun

Proof that  2 = 1

a = b

a² = a.b

a² + a² = a.b + a²

2a² = a.b + a²

2a² – 2ab = a.b + a² – 2ab

2a² – 2ab = a² – a.b

2(a² – a.b) = a² – a.b

Dividing through by (a² – a.b) gives 2=1

Q.E.D.

 

Martin P. Holt

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD

[Bruce Weaver]

Q1. How many possible values of Pearson r are there?  
A1. Two, one negative and one positive.

Q2. How do you choose which one to use if no additional info is provided?
A2. I have no idea what you're fishing for here, Mike, but here's one
possible approach:  Report the positive square root of r^2 and describe it
as the correlation between y and y-hat (which is always non-negative, even
if the correlation between x and y is negative).  

Okay, now maybe you can tell us what you're really looking for!  ;-)  



Mike wrote

> This is a somewhat old chestnut, so let me provide a novel conundrum.
>
> Consider:
> A person reports the result of a correlational analysis and only reports
> the valuw od r^2.  There are no scaterplots, no raw data, nthing except
> the "effect size" measure r^2.
>
> Question:  What is the value of the Pearson r?
>
> A better question is "how values of Pearson r are there and how do you
> choose which one to use if no additional info is provided?" ;-)
>
> -Mike Palij
> New York University

> mp26@

>
> P.S.  I'm getting well again.
>
>
> On Tue, Dec 11, 2018 at 11:54 AM Martin Holt <

> 000002126fbb7baa-dmarc-request@.uga

>> wrote:
>
>>  *Xmas draws nearer!*
>>
>>
>> *For  young statisticians...some festive fun*
>> *Proof that  2 = 1*
>> a = b
>> a2 = a.b
>> a2 + a2 = a.b + a2
>> 2a2 = a.b + a2
>> 2a2 – 2ab = a.b + a2 – 2ab
>> 2a2 – 2ab = a2 – a.b
>> 2(a2 – a.b) = a2 – a.b
>> Dividing through by (a2 – a.b) gives 2=1
>> Q.E.D.
>>
>> Martin P. Holt
>> ===================== To manage your subscription to SPSSX-L, send a
>> message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text
>> except the command. To leave the list, send the command SIGNOFF SPSSX-L
>> For
>> a list of commands to manage subscriptions, send the command INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD





-----
--
Bruce Weaver
[hidden email]
http://sites.google.com/a/lakeheadu.ca/bweaver/

"When all else fails, RTFM."

NOTE: My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.

--
Sent from: http://spssx-discussion.1045642.n5.nabble.com/

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
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[Bruce Weaver]

Here's something similar for any students who are currently writing exams.  

https://i1.wp.com/media-cache-ec0.pinimg.com/736x/d9/f6/fc/d9f6fcfa8557d16d22aaa590aeff1d14.jpg?zoom=2.625&resize=382%2C264

I'll try inserting the image--those reading via Nabble should be able to see
it.

<http://spssx-discussion.1045642.n5.nabble.com/file/t7186/d9f6fcfa8557d16d22aaa590aeff1d14.jpg>



Martin Holt-3 wrote

>  Xmas draws nearer!
>
> For  young statisticians...some festive funProof that  2 = 1a = ba2 =
> a.ba2 + a2 = a.b + a22a2 = a.b + a22a2 – 2ab = a.b + a2 – 2ab2a2 – 2ab =
> a2 – a.b2(a2 – a.b) = a2 – a.bDividing through by (a2 – a.b) gives
> 2=1Q.E.D.
> Martin P. Holt
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD





-----
--
Bruce Weaver
[hidden email]
http://sites.google.com/a/lakeheadu.ca/bweaver/

"When all else fails, RTFM."

NOTE: My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.

--
Sent from: http://spssx-discussion.1045642.n5.nabble.com/

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD