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Search: Posts Made By: fftfk
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Forum: 964 Forum
04-04-2018, 10:38 PM
Replies: 67
Views: 5,022
Posted By fftfk

Alright - let's see how well it does with an...

Alright - let's see how well it does with an actual sale. BAT has a cabriolet currently for sale: https://bringatrailer.com/listing/1992-porsche-911-carrera-4/

Sale Year 2018
1992
Cabriolet...
Forum: 964 Forum
04-04-2018, 10:32 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $44,958 assuming a...

The model predicts you paid $44,958 assuming a C2. If it was a C4 subtract $1,124.



The model predicts you paid $35,808.
Forum: 964 Forum
04-03-2018, 02:19 PM
Replies: 67
Views: 5,022
Posted By fftfk

I relooked at your original post and didn't see...

I relooked at your original post and didn't see the comment about the repaint. The model doesn't eccou t for the condition or color of the car.
Forum: 964 Forum
04-02-2018, 08:31 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $35,034 in 2013. ...

The model predicts you paid $35,034 in 2013. With the same mileage today the model predicts your car is currently worth $58,105. Note - the model does not take into account wide body so I would...
Forum: 964 Forum
04-02-2018, 08:25 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $23,450 in 2010...

The model predicts you paid $23,450 in 2010 (assuming you have a coupe as you didn't say) and that your car is currently worth $53,534 (this seems high for a tip).



The model predicts you paid...
Forum: 964 Forum
04-02-2018, 08:57 AM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $50,544 and your car...

The model predicts you paid $50,544 and your car is currently worth $52,397.




The model predicts you paid $31,958.
Forum: 964 Forum
03-22-2018, 10:57 AM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $20,523 and your car...

The model predicts you paid $20,523 and your car is currently worth $49,372.
Forum: 964 Forum
03-22-2018, 10:45 AM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you should be happy with the...

The model predicts you should be happy with the deals you got.
Forum: 964 Forum
03-21-2018, 04:41 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $25,792 in 2013.

The model predicts you paid $25,792 in 2013.
Forum: 964 Forum
03-21-2018, 04:37 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts you paid $27655 in 1998 and...

The model predicts you paid $27655 in 1998 and that your car is worth $49,866 today.
Forum: 964 Forum
03-21-2018, 03:25 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts the cost of your car was...

The model predicts the cost of your car was $52,745.
Forum: 964 Forum
03-21-2018, 12:20 PM
Replies: 67
Views: 5,022
Posted By fftfk

I could tell you but then I'd have to kill you. ...

I could tell you but then I'd have to kill you. BTW - you need to stop looking at certain websites so often!
Forum: 964 Forum
03-21-2018, 12:17 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts the following purchase prices:...

The model predicts the following purchase prices:
Car 1 - $53,790
Car 2 - $41,505
Car 3 - $51,602

I completely agree about the subjective condition of the car and didn't even attempt that.
Forum: 964 Forum
03-20-2018, 11:54 PM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts your purchase price was $9443...

The model predicts your purchase price was $9443 using all of the variables and $14,114 using only significant variables. I think this is most likely due to the limited number of targa's included in...
Forum: 964 Forum
03-20-2018, 10:40 AM
Replies: 67
Views: 5,022
Posted By fftfk

I'm not doing it for a living....yet. Better...

I'm not doing it for a living....yet.

Better data would definitely make it more accurate. One of the common critiques my first go through is that the data ignores a lot of private sales and...
Forum: 964 Forum
03-20-2018, 10:36 AM
Replies: 67
Views: 5,022
Posted By fftfk

[QUOTE=sooner964;14882519]Very nicely done! Data...

[QUOTE=sooner964;14882519]Very nicely done! Data Science and Statistics are truly fascinating. I'm a geophysicist by training, but would love to dive more in to these types of studies in my spare...
Forum: 964 Forum
03-20-2018, 10:25 AM
Replies: 67
Views: 5,022
Posted By fftfk

The model predicts the purchase price was $48,423.

The model predicts the purchase price was $48,423.
Forum: 964 Forum
03-20-2018, 12:49 AM
Replies: 67
Views: 5,022
Posted By fftfk

If you would like to see how accurate the...

If you would like to see how accurate the multiple regression is please post info about your car including year purchased, mileage when purchased, drivetrain, transmission, body style and model year...
Forum: 964 Forum
03-20-2018, 12:44 AM
Replies: 67
Views: 5,022
Posted By fftfk

In addition to the above, I created three neural...

In addition to the above, I created three neural nets just to show the graph of the model...you guys are free to interpret them as you see fit....
Forum: 964 Forum
03-20-2018, 12:39 AM
Replies: 67
Views: 5,022
Posted By fftfk

Updated Price Analysis

Some of you may have seen my initial 964 Price Analysis (https://rennlist.com/forums/964-forum/1056189-964-price-analysis.html). I have updated the analysis with respect to feedback received the...
Forum: 964 Forum
03-14-2018, 03:53 PM
Replies: 110
Views: 10,229
Posted By fftfk

That sucks! I'm sorry to hear that. I just did...

That sucks! I'm sorry to hear that. I just did this price analysis: https://rennlist.com/forums/964-forum/1056189-964-price-analysis.html

I am working on updating the analysis but can tell you the...
Forum: 964 Forum
03-13-2018, 12:45 AM
Replies: 19
Views: 6,079
Posted By fftfk

Updated the original post with info about...

Updated the original post with info about mileage. If anyone is interested your can recreate the regression analysis in R using the data and the following code:

library(xlsx)
porsche <-...
Forum: 964 Forum
03-12-2018, 11:08 PM
Replies: 19
Views: 6,079
Posted By fftfk

Ralph 3 - I just double checked and the reported...

Ralph 3 - I just double checked and the reported mileage is actually 51 miles (post #29). I agree that is most likely an error and took it out. I took out the flatnose and adjusted your model year...
Forum: 964 Forum
03-12-2018, 09:52 AM
Replies: 19
Views: 6,079
Posted By fftfk

I'll see about regressing price against mileage...

I'll see about regressing price against mileage when I get home. I'll also look at adding C2/C4 info. I think I can do it without too much additional work.
Forum: 964 Forum
03-11-2018, 08:57 PM
Replies: 19
Views: 6,079
Posted By fftfk

Also...I hope the predictions are accurate!

Also...I hope the predictions are accurate!
Showing results 1 to 25 of 43
 


 
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