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Nigel Marriott's Blog

An independent statistician using data to understand our world and to predict the future

You are here: Home / Archives for trend analysis

UK Weather Trends #24 – Annual Temperatures in 2022

January 3, 2023 By Nigel

The 2022 calendar year was the hottest year on record in the UK beating the previous high recorded in 2014.  Does that mean that the UK is starting a new warming phase?  Using a technique known as a Control Chart, I show the answer is “Not Yet“.

[Read more…] about UK Weather Trends #24 – Annual Temperatures in 2022

Filed Under: Weather Tagged With: SPC, Statistical Process Control, t-test, temperature, trend analysis, Weather, weather trends

UK Weather Trends #23 – Autumn 2022

December 4, 2022 By Nigel

The UK autumn in 2022 was the 3rd warmest on record and consistent with the step change in autumnal climate seen 25 years ago.

[Read more…] about UK Weather Trends #23 – Autumn 2022

Filed Under: Weather Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Trends #22 – Summer 2022

September 7, 2022 By Nigel

The 2022 UK summer was the 4th warmest & 9th driest on record.  When looked at using principal components, the summer was definitely a good one and showed up yet again my inability to predict good summers!

[Read more…] about UK Weather Trends #22 – Summer 2022

Filed Under: Weather Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Trends #21 – Spring 2022

June 7, 2022 By Nigel

Spring 2022 was the 5th warmest on record and was mostly typical of the springs that we now get due to our changing climate.

[Read more…] about UK Weather Trends #21 – Spring 2022

Filed Under: Weather Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

Pay Gap Trends #5 – Has pay gap reporting narrowed the gender pay gap?

May 13, 2022 By Nigel

Disinterested employers were 20% less likely than engaged employers to have narrowed their UK gender pay gap between 2017 & 2021 .  I draw this conclusion from a statistical model using ~6,000 employers which removed the effect of confounders such as size, sector, furlough, gender ratio, etc.  Once accounted for, I found 61% of those reporting their pay gap for 2019 had narrowed their pay gap by 2021 compared to 55% of those not reporting 2019 data.

[Read more…] about Pay Gap Trends #5 – Has pay gap reporting narrowed the gender pay gap?

Filed Under: Diversity Tagged With: Gender Pay Gap, GLM, logistic regression, pay gap trends, Pay Modelling, trend analysis

UK Weather Trends #20 – Winter 2022

March 4, 2022 By Nigel

Winter 2022 was the 8th warmest on record and was typical of the winters that we now get due to our changing climate.

[Read more…] about UK Weather Trends #20 – Winter 2022

Filed Under: Weather Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Trends #19 – Autumn 2021

December 4, 2021 By Nigel

The UK autumn in 2021 was the 3rd warmest on record and consistent with the step change in autumnal climate seen 25 years ago.

[Read more…] about UK Weather Trends #19 – Autumn 2021

Filed Under: Weather Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Trends #18 – Summer 2021

September 5, 2021 By Nigel

The UK summer in 2021 was warmer and dryer than normal but when looked at using principal components, the summer cannot be defined as a good one.  I am not expecting 2022 to be a good one either!

[Read more…] about UK Weather Trends #18 – Summer 2021

Filed Under: Archive Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

Pay Gap Trends #4 – Did the UK gender pay gap narrow in 2020?

September 5, 2021 By Nigel

This article was last updated using data submitted as of 4th September 2021.

In February 2021, the EHRC confirmed that all employers with a headcount of 250 employees or more would have to submit their gender pay gaps based on the 2020 snapshot date.  Due to the lateness of this confirmation, they also stated that no enforcement action would be taken prior to the end of September 2021.  As result, fewer employers than expected have reported 2020 data so far so I have used two methods of imputation to estimate that the median gender pay gap among these employers narrowed by 0.2 to 0.3 pence in the pound in 2020.

[Read more…] about Pay Gap Trends #4 – Did the UK gender pay gap narrow in 2020?

Filed Under: Diversity Tagged With: data quality, Gender Pay Gap, imputation, missing data, trend analysis, year on year

UK Weather Trends #17 – Spring 2021

June 6, 2021 By Nigel

Spring 2021 was colder and sunnier than usual in the UK but otherwise unremarkable.  However the 3 months of spring were anything but unremarkable.

[Read more…] about UK Weather Trends #17 – Spring 2021

Filed Under: Archive Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

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