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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 #18 – Summer 2021

September 5, 2021 By Nigel Marriott

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 Marriott

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, Forecasting 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 Marriott

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

UK Weather Trends #16 – Winter 2021

March 6, 2021 By Nigel Marriott

Winter 2021 was wetter than usual in the UK but otherwise unremarkable.

[Read more…] about UK Weather Trends #16 – Winter 2021

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

UK Weather Trends #15 – Autumn 2020

December 4, 2020 By Nigel Marriott

The UK experienced unremarkable weather in all respects in Autumn 2020.

[Read more…] about UK Weather Trends #15 – Autumn 2020

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

COVID19 Cases #1 – Latest Data and Trends for England

September 27, 2020 By Nigel Marriott

Last updated on 27th September 2020 but downloadable spreadsheet in section 3a was updated on 19th October 2020.  I will update the post when I get the time!

The latest data for COVID19 (Coronavirus) cases in England as of Saturday 26th September 2020 shows the number of people testing positive for COVID19 is up 60% from a week ago but this masks extreme regional disparities that make the national trend meaningless.  The North is in the grip of a second wave unlike the South which is not.  Unless recent trends in the North abate, the scenario of 50k positive tests per day by the end of October recently postulated by the Chief Scientific Officer remains feasible.

[Read more…] about COVID19 Cases #1 – Latest Data and Trends for England

Filed Under: Forecasting Tagged With: Coronavirus, Covid19, DHSC, England, NHS, ONS, Pandemic, PHE, Presenting data, SARS-COV-2, trend analysis, Trend extrapolation

UK Weather Trends #14 – Summer 2020

September 8, 2020 By Nigel Marriott

Last year, I predicted that the 2020 summer would not be good and I was right.  On average it was duller, wetter and warmer than normal.

[Read more…] about UK Weather Trends #14 – Summer 2020

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

COVID19 Deaths #2 – Are Public Health England’s Figures Misleading?

July 25, 2020 By Nigel Marriott

During the first wave of the COVID19 epidemic, the daily number of deaths published by Public Health England (PHE) has been the main headline in the news.  On 17th July, Matt Hancock, Secretary of State for Health, called for a review of this time series after a blog published by Yoon Loke & Carl Heneghan of Oxford University questioned whether definition used by this time series was appropriate.  I myself had noticed a change in the PHEr time series in my tracker of COVID19 deaths in England but I hadn’t understood why this might have been the case.  After looking at the data again in more detail, I have concluded that this time series is overestimating the number of deaths by 42 +/- 13 per day since the 23rd May and it needs to be revised otherwise it will create confusion should a second wave come.

[Read more…] about COVID19 Deaths #2 – Are Public Health England’s Figures Misleading?

Filed Under: Forecasting Tagged With: Coronavirus, Covid19, CQC, England, NHS, ONS, Pandemic, PHE, Presenting data, SARS-COV-2, trend analysis, Trend extrapolation

COVID19 Deaths #1 – Latest Data and Trends for England

July 25, 2020 By Nigel Marriott

Last updated on 25th July 2020 – future updates will be infrequent.

The latest data for deaths due to COVID19 (Coronavirus) in England as of Friday 24th July 2020 show that the first wave of the pandemic is now over when one looks as excess deaths.  People will still be dying of COVID19 for weeks yet but the overall number of excess deaths is now negative.

[Read more…] about COVID19 Deaths #1 – Latest Data and Trends for England

Filed Under: Forecasting Tagged With: Coronavirus, Covid19, CQC, England, NHS, ONS, Pandemic, PHE, Presenting data, SARS-COV-2, trend analysis, Trend extrapolation

Pay Gap Trends #3 – Did the UK gender pay gap narrow in 2019?

June 14, 2020 By Nigel Marriott

On 24th March 2020, the UK government suspended enforcement of the gender pay gap reporting deadline of 5th April.  As of today, just over 50% of employers have reported their 2019 gender pay gap figures.  Despite this shortfall, I have used statistical imputation methods to calculate that the median gender pay gap narrowed in 2019 from 9.6 pence in the pound to 9.0-9.2 pence in the pound.

[Read more…] about Pay Gap Trends #3 – Did the UK gender pay gap narrow in 2019?

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

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Pay Gap Data #9 – Where can I find gender pay gap data for 2025?

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UK Weather Tracker #110 – March 2026

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