Scores or scoring - DPChallenge Forums

Canon EF 24-105mm f/4.0L IS

01/30/2006 02:22:08 PM · #1

Here's what I think and what I see.

I have seen threads talking about the average is 5.5, what a load crap.
Does not compute. No image has ever scored a 9 at the end. Wonder what the DPC average vote is? If you over all average is 4.5, does this make you bad photograph?

Where is the stat man at?

barndog

Canon EOS-6D Mark II

01/30/2006 02:28:02 PM · #2

Look through here:

Previous thread

coolhar

Canon PowerShot Pro 90 IS

01/30/2006 02:29:33 PM · #3

Not necessarily the average but 5.5 is the midway point in our voting scale of 1 thru 10 because you can't vote a 0.

Nikon AF-S DX Zoom-Nikkor 17-55mm f/2.8G IF-ED

01/30/2006 02:35:22 PM · #4

yeah but you can't vote 11 either

hokie

Nikon D2X

01/30/2006 02:44:43 PM · #5

Hold up one hand....5 fingers

Hold up the other hand...5 fingers

A 5 or a 6 falls on one hand or the other...not in the middle.

5.5..is in the middle. You need one more finger! ;-)

I'm a visual guy....I can count to 21!

stare_at_the_sun

Canon EOS-10D

01/30/2006 02:56:53 PM · #6

Listen to hokie...he is right.

I consider a 5.5 to be a pretty average score.

w24x192

Canon PowerShot S50

01/30/2006 03:00:32 PM · #7

It would still be nice to know what the honest-to-God average is. Sure, 5.5 is the middle of what we can get, but that doesn't necessarily mean that it is the dead middle of the bell curve of scores accross all scores at DPC. If the range of scores is from 8 to 3, then the middle is 5.5, but if the range is more like 7.5 to 2.5, then the middle is 5.

Like the OP said...where is the stat guy?

benhur

Canon EOS-40D

Canon EF 24-85mm f/3.5-4.5 USM

01/30/2006 03:07:02 PM · #8

Looking at the 432 Challenges that have been held since Sept 2002 the averages are as follows:

Enteries 195
Highest Scores 7.341
Average Scores 5.295
Midrange Scores 5.259
Lowest Scores 3.177
Total Votes 50,334
Average # Votes 237
Total Comments 2572
Avg # Comments 14

Hope this answers some questions.

Message edited by author 2006-01-30 15:07:37.

01/30/2006 03:10:30 PM · #9

yeah if the scale is 1 to 10...but the the scores don't show that... what the highest scoring image you see? not over a 8 something

01/30/2006 03:16:44 PM · #10

Originally posted by hokie:

now spread your hands apart what do you get?

Canon EF-S 10-22mm f/3.5-4.5 USM

01/30/2006 03:22:51 PM · #11

I know what averages are.. I bowled for many years...and that all about averages and two 5.5 don't make ten sorry just does not happen. Think I will go back to it 299 is my high and this place is getting boring!

mycelium

Canon EOS-350D Rebel XT

01/30/2006 03:24:15 PM · #12

well, if you like, the highest rated image is 8.6. the lowest is 1.8.

8.6 + 1.8 = 10.4

10.4/2 = 5.2

and this is pretty close to what benhur said.

one's average vote (received or cast) has almost nothing to do with their skill as a photographer, in my opinion.

Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical IF for Canon

01/30/2006 03:32:36 PM · #13

At the close of the Fantasy Challenge there has been 432 challenges (yes 432) dating back to Jan 14, 2002. And here are the stats:
Avg Entries -195
Blue Ribbon Avg. - 7.3422
Avg. Score - 5.2955
Midrange Score - 5.2599
Avg. Lowest Score - 3.1772
Avg. # of votes per entry - 237
Avg. # of comments received per entry - 14

01/30/2006 03:43:32 PM · #14

Matter of fact I just drug out all my bowling equpiment, been 3 years since I even throwed a ball. Left my last season with a 227 average thats out of 300 top and 0 at the end now 150 would be average. Zero would be 20 guter balls never gonna happen. Unless you did it on purpose. But Why?

Message edited by author 2006-01-30 15:47:13.

Canon EF-S 18-55mm f/3.5-5.6

01/30/2006 03:48:48 PM · #15

[quote=stare_at_the_sun] Listen to hokie...he is right.

I'm hard headed sorry

fotomann_forever

01/30/2006 04:03:31 PM · #16

Originally posted by southern_exposure:

At the close of the Fantasy Challenge there has been 432 challenges (yes 432) ...
Avg. Score - 5.2955
Midrange Score - 5.2599

So, it's safe to assume ~5.3 is the average, statistically speaking, not 5.5.

Don't happen to have a margin of error do ya? ;-)

Message edited by author 2006-01-30 16:04:53.

polkop

Canon EOS-400D Rebel XTi

01/30/2006 04:10:29 PM · #17

Originally posted by hokie:

hold up one hand four fingers one thumb
hold up the other hand four fingers one thumb

Message edited by author 2006-01-30 16:11:18.

Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical IF for Canon

01/30/2006 04:21:16 PM · #18

Originally posted by fotomann_forever:

Originally posted by southern_exposure:
At the close of the Fantasy Challenge there has been 432 challenges (yes 432) ...
Avg. Score - 5.2955
Midrange Score - 5.2599

So, it's safe to assume ~5.3 is the average, statistically speaking, not 5.5.

Don't happen to have a margin of error do ya? ;-)

No margin of error :) taken from factual data from the site.

But if I may add the following:
People think the avg is 5.5 and really it is 5.0. Let me explain: it is just as likely to receive a 10 as a zero. Yes you can receive a zero if no one votes on your image.
But realistically people are going to receive votes on there image and no one will receive a 10 and no one will receive a zero.

My theory is very reliable because if you look at the possible and the realistic votes and formulate them you come up with an average very close to what the site average is.

PA = Perceived Avg.
AA = Actual Avg.
VA = Site Avg.

Formula: PA + AA / 2 = SA [(5.5 + 5.0)/2]= 5.2500
So the site has an avg score of 5.2955 and the VA avg is 5.2500 thats only .0499 difference. Close!
But why the .0499 difference? Because if someone received 100 votes broken down 50-9's and 50-10 then you would arrive at a fraction 9.5. But if the same happened on on the low end 50-0's and 50-1's there would be no fraction, it would be an avg of 1.0. So it's fitting that .0499 (almost) half above the Site VA of a scale 0-10

Message edited by author 2006-01-30 16:35:14.

yakatme

Lytro Illum Light Field Digital

Nikon AF-S Nikkor 17-35mm f/2.8D IF-ED

01/30/2006 04:45:56 PM · #19

Originally posted by southern_exposure:

it is just as likely to receive a 10 as a zero. Yes you can receive a zero if no one votes on your image.
But realistically people are going to receive votes on there image and no one will receive a 10 and no one will receive a zero.

My theory is very reliable because if you look at the possible and the realistic votes and formulate them you come up with an average very close to what the site average is.

Unless I'm missing something, this is incorrect. While averaging the scores, the zeros are not counted and I have given a few 10's. You have no way of calculating how many voters to divide the total score by if you want to include zeros because you don't know how many voted zeros ("no one votes on your image")

Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical IF for Canon

01/30/2006 04:59:19 PM · #20

Originally posted by yakatme:

Originally posted by southern_exposure:
it is just as likely to receive a 10 as a zero. Yes you can receive a zero if no one votes on your image.
But realistically people are going to receive votes on there image and no one will receive a 10 and no one will receive a zero.

My theory is very reliable because if you look at the possible and the realistic votes and formulate them you come up with an average very close to what the site average is.

Unless I'm missing something, this is incorrect. While averaging the scores, the zeros are not counted and I have given a few 10's. You have no way of calculating how many voters to divide the total score by if you want to include zeros because you don't know how many voted zeros ("no one votes on your image")

Maybe I did not explain my explanation enough.
My point is we have a 1-10 scale and it is just as possible or close, to receive a Zero as a ten in overall voting. Out of a 100 votes it is very unlikely anyone will receive a 100 tens (perfect score) and it is very unlikely anyone will not get any votes but the possibilities are there.
If someone entered a picture and it received zero votes - how would it be scored? What place would it be in?

Message edited by author 2006-01-30 17:00:47.

hokie

Nikon D2X

Nikon AF-S DX Zoom-Nikkor 17-55mm f/2.8G IF-ED

01/30/2006 05:03:34 PM · #21

Originally posted by southern_exposure:

But, unlike other types of voting..0 is actually a good thing here. It means it is not averaged therfore having no effect.

I would prefer to receive a 0 (a no vote) if the person is intending to vote lower than my current average on my photo.

If the person voting a 0 actually counted ala..if I had 200 votes and then voter number 201 voted a 0..then a 0 would be bad. You would be adding a vote counted but no numerical addition.

So, the premise that the median in our system is 5.5 is accurate.

Message edited by author 2006-01-30 17:07:21.

yakatme

Lytro Illum Light Field Digital

Nikon AF-S Nikkor 17-35mm f/2.8D IF-ED

01/30/2006 05:05:11 PM · #22

I see, it will be really close but not absolutely exact.

Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical IF for Canon

01/30/2006 05:07:30 PM · #23

Originally posted by hokie:

Originally posted by southern_exposure:

Maybe I did not explain my explanation enough.
My point is we have a 1-10 scale and it is just as possible or close, to receive a Zero as a ten in overall voting. Out of a 100 votes it is very unlikely anyone will receive a 100 tens (perfect score) and it is very unlikely anyone will not get any votes but the possibilities are there.
If someone entered a picture and it received zero votes - how would it be scored? What place would it be in?

But, unlike other types of voting..0 is actually a good thing here. It means it is not averaged therfore having no effect.

I would prefer to receive a 0 (a no vote) if the person is intending to vote lower than my current average on my photo.

You a right on that but my point is I don't think we will ever see a 10 avg. and I don't think we will ever see a 0 avg. But if we did see them we have no problem knowing the picture that scored a 10 would win the blue. But were would the 0 avg. photo place? last?

coolhar

Canon PowerShot Pro 90 IS

01/30/2006 05:08:03 PM · #24

Originally posted by southern_exposure:

If an entry did not receive any votes it would not have an average vote. We have been talking of averages in this thread. Non-votes are not included in the averages.

If you really think it is nearly as likely to receive a vote of zero as it is to receive a vote of ten, I have this really nice bridge that I am trying to sell at a bargain price. You would feel great as a bridge owner.