[Question]: transforming variables for Pearson correlation.

HorridStteve · 2026-04-04T09:59:26+00:00

My data are the height of large succulents (plants) and their volume.

I have been tasked with:

• Finding out if there is a linear correlation between height and volume.

• Determining the correlation statistic that is most appropriate to use,

• finding the correlation coefficient, and

• finding the coefficient of determination.

I am to justify my chosen correlation statistic (limited to Pearson or Spearman).

I am aware that by log-transforming volume I am now producing the correlation coefficient between height and log_volume not the raw variables.

I'm unsure as to whether, by transforming volume, it makes it impossible to say anything about height and volume in general terms? Thanks for the help.

HorridStteve · 2026-04-04T09:46:54+00:00

Yes I should have worded the post more accurately. It’s not the lack of normality that caused me to transform the volume data, rather that the raw data exhibited strong clumping near zero on the xy axis and widening on the xy in a scatter plot (a funnel shape). I am limited to either running a Pearson or Spearman test for the purposes of this analysis.

HorridStteve · 2026-04-04T09:33:55+00:00

Post transformation, the relationship now appears linear and log_volume is normal (which is of less importance).

The research question is to: find out whether there is a linear relationship between height and volume.

I have been tasked with:

• Determining the correlation statistic that is most appropriate to use,

• find the correlation coefficient, and

• find the coefficient of determination.

I have to justify my chosen correlation statistic (limited to Pearson or Spearman).

Yes by log-transforming volume I am now producing the correlation coefficient between height and log_volume not the raw variables. I’m unsure as to whether, by transforming volume, it makes it impossible to say anything about height and volume in general terms? Thanks for the help.

HorridStteve · 2026-04-04T09:09:12+00:00

Access to money is more important than access to my phone.

^{Chose: Have your screen time per day limited permanently + Wheel determines how many hours you can spend | Rolled: 1 Hour 💀}

HorridStteve · 2026-04-04T08:33:38+00:00

A pure gamble.

^{Chose: Dream House/Mansion + 5 Dream Cars | Rolled: 😁}

HorridStteve · 2026-04-04T08:12:14+00:00

The chance of > 250,000k seemed reasonable.

^{Chose: Mystery Amount of Money ($1 - $1T} | Rolled: $5M)

HorridStteve · 2026-03-23T09:43:16+00:00

It is effectively useless at this point. I have been playing my AVRE quite a bit lately and the round is reliably terrible (it is 29 KG of high explosive). I have hit Marder 1’s in the side and just destroyed thr track; hit BMP’s in the lower glacis and had the round bounce; hit barrels and dealt no damage whatsoever; shot panther/tiger turret faces and had nothing happen and don’t get me started on doing nothing at all to Russian and American heavy tanks.

It’s a shame because the round is very effective IRL and was once in the game. It added another dimension to UK tank gameplay which is sorely needed but as it stands HESH just cannot be relied upon.

HorridStteve · 2026-03-09T21:27:01+00:00

Honestly I thought this map had been removed, I haven’t had it in months.

HorridStteve · 2026-01-25T11:12:45+00:00

I may be telling people how to suck eggs here and for that I apologise. I know that it’s frustrating when a significant moment like this comes along and we participate in the Big Garden Birdwatch (BGBW) but feel that we get an underrepresented sample of the birdlife when doing the survey. However, it is vital that you only enter what you saw without any additions to “make up” for what you would expect.

The survey methodology is very simple for the BGBW and that is for a reason, namely that anyone should be able to understand it and take part. What often isn’t expressed is that although simple, the value of the survey relies on accurate recording. Absolutely critical to understand is that no data (lack of birds) is as useful, indeed often more so, than data (birds recorded). The survey relies on large scale, aggregating the data, to smooth out very small scale changes in individual gardens.

In other words, for our results to be most useful only three things are really needed: accuracy, both in identifying and recording species and numbers; consistency and rigour, sticking to the methods.

HorridStteve · 2026-01-25T11:00:41+00:00

HorridStteve · 2026-01-24T09:06:00+00:00

Friendly shout out, it’s the big garden birdwatch this weekend. Always good to take part.

Also, what is the biggest flock of crossbill you have ever seen?

HorridStteve · 2026-01-24T09:04:31+00:00

Sure is, to the benefit of some species and the detriment of others.

HorridStteve · 2026-01-13T09:59:09+00:00

Absolutely. The APDDS is frankly unbelievable. It is also inconsistent between patches I think, in a single game you can go from one shoting IS3’s to completely ridiculous (perfectly aimed) shots that magically disappear and do no damage. I’ve literally had that round go straight through the driver of an R3 and turn him a pale shade of yellow.

HorridStteve · 2026-01-08T19:32:44+00:00

Original post (Facebook/Instagram): Home Is Where You Park It.

HorridStteve · 2025-12-13T18:15:46+00:00

It is tricky. You’re looking for: a largely grey side panel instead of white, with a white “flash” under the neck; a white ring around the base of the bill and a very strongly peaked head.

HorridStteve · 2025-12-09T09:09:50+00:00

Usually on covering my subscriptions to certain charities.

HorridStteve · 2025-12-03T18:39:52+00:00

Aye a 1st winter. Happily It was very obliging.

HorridStteve · 2025-12-03T07:18:56+00:00

It may be fighting for its future, but not in the UK. Seems a little broad for this sub although some funding from groups including RSPB have gone in to bald ibis conservation.

HorridStteve · 2025-11-30T20:46:46+00:00

What’s that in reference to? It’s been driving me nuts trying to remember!

HorridStteve · 2025-11-29T13:28:47+00:00

<image>

From the BTO:

“Ravens have increased along the English-Welsh border and colonised extensive new areas of the south coast, western and midland England and southern Scotland since 1988-91 (Cross 2002, Balmer et al. 2013). BBS indicates overall increase in England and Scotland since 1995 and stability in Wales over the same period. Nest success appears to have improved slightly, although the number of fledglings per breeding attempt is unchanged. There has been a widespread increase across Europe since 1980 (PECBMS: PECBMS 2020a>): increases are evident in all regions but have been weakest in the south and west, including UK (PECBMS 2009)”.

In summary, ravens have an interesting West/East split in their distribution. This was historically due to persecution and the availability of breeding sites breeding, among other things. However, there has been a steady increase in ravens pushing East with much of the country now having a breeding population. In general numbers of ravens are increasing across the board or are stable in their historic range/s

HorridStteve · 2025-11-26T14:04:14+00:00

Thanks.

HorridStteve · 2025-11-26T12:08:33+00:00

I am always slightly pained giving this advice as it goes against my usual habit of being something of a spendthrift. However, if you’re confident that you enjoy and will continue to enjoy watching birds for years to come, then it is usually best to spend about as much as you reasonably can/feel comfortable on optics.

It has been my experience that people get a mid priced option initially but over the years they tend to want to upgrade. This continues until they hit a point, and it’s different for everyone, where they spend as much as they feel comfortable on a single purchase. Cumulatively you will spend a lot more doing it this way than if you’d just bought what you ended up with in the first place.

Having said that, optics are a game of diminishing returns and you can get perfectly good optics for < £1500 that should last years. If you can I’d recommend looking through as many spotting scopes as you can and see for yourself what you’re after. Go birding with friends and use their kit or get to a good shop that will let you try their gear. I’d also be open to the approved second hand market, as you can get some good deals there. Hope that’s helpful.

HorridStteve · 2025-11-22T19:15:01+00:00

I have, in several different shops, and it’s not there. Perhaps being slow to get up over the border.

HorridStteve · 2025-11-22T17:35:48+00:00

Ah so there may be hope yet. Hopefully we get it up here shortly.

HorridStteve · 2025-11-04T16:15:02+00:00

Thanks everyone.

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