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Thanks for the input - always happy to get some constructive criticism.
I'm using IBM SPSS at the moment to generate the descriptives and the box plots (it also does histograms but I've been quickly re-doing them in Excel as it gives a little more flexibility with how it's presented), as well as some inferential statistics in other analyses. It's inputting the data that's time consuming. I'm definitely interested in looking at what else is out there to make this process a bit easier but for the moment SPSS is a booklisted program for my university course so it comes with the added bonus of extra practice.
List management/analysis and football stats analysis is something I have a keen interest in and have considered as a career path, but for the moment it's just a hobby more than anything else.
I agree; not a great point to make. What I was trying to say is that our height distribution (especially within the 181-195 range in particular) is much more positively skewed than those of the comparison teams'; we're "behind" in that our players are built up at a shorter height than the shown competitors' players. The use of the word "behind" wasn't intended to infer ladder position or quality or anything of the sort.
Thanks for going through with it and I appreciate all the work you've done. I can understand how this is time consuming for you because it seems like you are reviewing the data yourself. You need a data cube to make it faster to develop these visual aids.
Here is an example concerning Australian higher education: http://highereducationstatistics.education.gov.au/
I can come up with quantitative comparative analyses across universities (i.e. in terms of domestic/international students, casual staff/non casual, gender distributions etc.), similar to what you have done here with footy teams, but it takes **** all time because the software does it for me. When you have this kind of quick route it makes it easier to get to communicating and simplifying the importance of the results (which, if you dont mind a bit of constructive criticism, you seem to be good at but still have the capacity to further develop your skills).
Given the interest in footy, it'd be good for you to look in to the software for this (you seem to have a career interest in this area, if I am not mistaken).
Ever thought about an academic career in this area? looks to be fertile ground with plenty of interest...
I agree we didn't lose height from last year but I suspect we were already on the short side so comparing this season's list to the 2014 list is not a good reference point. I'd be quite surprised (and very pleased) if those four all grew 3 cm in 3 years.Our 2015 list is the youngest in the AFL besides GC & GWS, and we are very close to them now. We didn't lose height on our main list this season, but we definitely lost age & experience. Not everyone on the list will grow, but players like Dale, Cordy, McLean & Hamilton could be 3cm taller in 3 years
See various comments above in red. That we look like having one of the shortest (in stature) playing lists in the AFL seems likely. Where the discussion needs to go is whether this is a good thing, a bad thing or just inconsequential.We haven't seen the average height for each side, only an overall AFL average. It would be interesting to see whether there is a correlation between average height and finishing position. I agree - it would be interesting. I do note that Hawthorn are below the AFL average despite winning the flag.
But what there is an undisputed correlation between is average age and finishing position. GC, GWS & us are at the bottom, whilst Hawthorn, Fremantle & North are at the top. Correct - nobody is disputing this. That's probably why not many rate us much of a chance in 2015.
Yet there hasn't been any discussion praising the club for going with Boyd, Biggs & Hamling as mature agers, as opposed to picking up more 18 year olds. There has been a little bit of discussion on it over the last month - but that discussion is more about maturity, experience and the relative merits of picking up other clubs' delisted players, not about height. (BTW, I'd be hesitant to call Tom Boyd a "mature ager" - he's only 5 months older than Toby McLean.) There has even been negative feedback from our retention of Goodes on the rookie list, to retain some experience after losing so much of it this off season
Not sure if we can even get a list of players on our list in 2011 for that. I have found the list - see below for results.
Calling it an imbalance is presuming we are too short. It is a fact that we are shorter than the AFL average, it is not established that the AFL average is the ideal list height. I agree there can be no certainty around this, only weight of opinion (and even weight of opinion doesn't necessarily make it right!) In the evolution of AFL match tactics and list strategies, clubs will always be trying to gain an edge in one area or another. Who's to say that taller is, of itself, better? Let's just say we look like being close to the shortest list in the AFL (tbc).
You seem to have been consistently a couple of years behind the play on this one Butane. We're now consolidating because we now have the cattle with the possible exception of a quality KPD and half back. 2, possibly 3 players doesn't constitute a rebuild. The sensationally successful recruiting matrix that Macca introduced to the club has netted us quality players and leaders like Stringer, Macrae, Hrovat, Bontempelli, Jong etc etc. And treachery and circumstance have netted us a no.1 draft pick KPF (every cloud...).Not the point, we we've been too small for years and lack elite AFL quality in the minimal ones we have. Balancing our heights from last seasons should have been a minimum requirement not a pat on the back.
BUT seeing as though we're now going down a rebuilding phase properly and are one of the youngest teams in the AFL I think we can afford to get the best talent in and then work on getting the heights and shapes of the list sorted out in the next few trade periods.
You might be thinking of median (the mid-point in a series of numbers).Unless I have completely forgotten my mathematics, with an AFL "average height" for each club, doesn't that mean that up to half the lists are either at, or below that mark, not just us ?
Michael Talia 195 --> 194 = 1 cm "shrinkage"!
My guess is that average growth from time of drafting (an 18yo) to the time they stop growing would be about 1 cm.
You might be thinking of median (the mid-point in a series of numbers).
It can also be true of an average but it relies on having a fairly even and equal distribution above and below the average. I don't know what the distribution is like in this case.
You seem to have been consistently a couple of years behind the play on this one Butane. We're now consolidating because we now have the cattle with the possible exception of a quality KPD and half back. 2, possibly 3 players doesn't constitute a rebuild. The sensationally successful recruiting matrix that Macca introduced to the club has netted us quality players and leaders like Stringer, Macrae, Hrovat, Bontempelli, Jong etc etc. And treachery and circumstance have netted us a no.1 draft pick KPF (every cloud...).
Beveridge must be ecstatic at the highend quality of the list he's inherited and will no doubt be intent on getting match time/experience into this block of mainly 3rd, 4th and 5th year quality players (Bonts and T Boyd being 2nd year) so that next year when the block is mainly 4th, 5th and 6th year players we'll be ready for a 2013 Port style launch at finals in 2016. And like Port at the end of 2012 and in subsequent years since, a couple of astute off season acquisitions at the end of the year to plug the few gaps that remain.
Moral - take all measurements with a grain of salt. Whichever ones are correct (if any) they aren't as rigorously done, cross-checked and republished as we fans would hope for.
1. Yes they do. I realise that this isn't the best way to do things but I had a side interest in the overall distribution for something unrelated and just went with it. I meant to put a note in there about it but forgot. I did run the descriptives however. Without us included the AFL average height increases to 188.39cm (increase of ~0.09cm), median remains the same at 188cm, and the standard deviation decreases to 7.37 (~0.02cm decrease). So it's only a slight effect in the expected direction.Thanks Dannnn. Two quick questions:
(1) do the AFL averages include the WB? I'm presuming yes, which means it gets pulled down slightly by the WB stats. (Is it easy to calculate the AFL averages without the WB figures included?)
(2) are we the shortest in the AFL on all/any of those measures you discuss ... or don't you have the 18 club-by-club averages?
Thanks Dannn, great work again.1. Yes they do. I realise that this isn't the best way to do things but I had a side interest in the overall distribution for something unrelated and just went with it. I meant to put a note in there about it but forgot. I did run the descriptives however. Without us included the AFL average height increases to 188.39cm (increase of ~0.09cm), median remains the same at 188cm, and the standard deviation decreases to 7.37 (~0.02cm decrease). So it's only a slight effect in the expected direction.
2. I don't know that, sorry. For the purposes of the analysis it was much easier to collectively group all player heights into one 'AFL' category than split them (aside from the three reference teams). It's doable without too much effort given the way I've laid out the data sheet but it's a fair way down the list at the moment.
One legitimate criticism of people who only quote statistics* is that they measure the tangibles well, but not the intangibles. How for instance, do you quantify talent or determination?There is a saying I am rather fond of about "dam lies and statistics" in saying that I acknowledge the work that Dan has put in but, the Brisbane list he quotes has Tom Cutler (7) games, Jackson Paine likely to be delisted in 2015 (6) games and Nick Robertson (8) games hardly best 22 players.
Saints fare a little better with Like Delaney (22) but then we have Dylan Robertson (7) games, and McCartin 0
Hawthorn we have Tim O'Brien (4) games and on the rookie list is Kurtz Heatherington 0 games.
Does variables like talent or determination (Dalhousie) have a bigger sway then simply height?
Statistics don't lie as they're only a quantification of things that actually happened - statistics lie when people use them incorrectly. They're only as sound as the conclusions that are drawn from them and in this case I've only drawn very vague comparisons and left most of the interpretation for others to discuss.There is a saying I am rather fond of about "dam lies and statistics" in saying that I acknowledge the work that Dan has put in but, the Brisbane list he quotes has Tom Cutler (7) games, Jackson Paine likely to be delisted in 2015 (6) games and Nick Robertson (8) games hardly best 22 players.
Saints fare a little better with Like Delaney (22) but then we have Dylan Robertson (7) games, and McCartin 0
Hawthorn we have Tim O'Brien (4) games and on the rookie list is Kurtz Heatherington 0 games.
Does variables like talent or determination (Dalhousie) have a bigger sway then simply height?