mathematics

Len Cook

Len Cook is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Len Cook rather than just read about it. In short: Leonard Warren Cook CBE CRSNZ (born 13 April 1949) is a professional statistician who was Government Statistician of New Zealand from 1992 to 2000, and National Statistician and Director of the United Kingdom Office for National Statistics, and Registrar General for England and Wales from 2000 to 2005. He served as Families Commissioner in New Zealand from 2015 to 2018.

Key takeaways

Len Cook belongs to mathematics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Len Cook to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Len Cook from memory before moving on to harder problems.

Reference excerpt

Leonard Warren Cook CBE CRSNZ (born 13 April 1949) is a professional statistician who was Government Statistician of New Zealand from 1992 to 2000, and National Statistician and Director of the United Kingdom Office for National Statistics, and Registrar General for England and Wales from 2000 to 2005. He served as Families Commissioner in New Zealand from 2015 to 2018.

Background Cook was born in Dunedin, New Zealand, in 1949 and was educated at Bayfield High School, Dunedin and the University of Otago where he did a BA (Hons) in Maths and Stats.

He attended Henley Management Centre in 1989 and INSEAD in 1998. Cook was elected a Chartered Statistician of the Royal Statistical Society in 1973 and a Companion of the Royal Society of New Zealand in 2005.

He served as one of three vice-presidents of the International Statistical Institute from 2005 to 2007 and is a visiting fellow of Nuffield College, Oxford. He was made a CBE in June 2005. Cook had a particular interest in social policy, demography, statistical methodology and the application of information technology in statistical systems. He was interested in the promotion of research methodology in public policy analysis and decision-making with past interests particularly in retirement provision and taxation policies. He and his partner, Shirley Flora Vollweiler, have no children. His hobbies are languages, travel, hiking and fly fishing.

Department of Statistics, New Zealand After joining the Department of Statistics, New Zealand, (now Statistics New Zealand) in 1971, he was appointed as Assistant Government Statistician in 1982, Deputy Government Statistician in 1986 and Government Statistician in 1992. He was a member of the secretariat of the Prime Minister's Task Force on Tax Reform in 1981/82 and a member of the Royal Commission on Social Policy in New Zealand in 1987/88.

Office for National Statistics, United Kingdom Cook took up the post of National Statistician and Director of the Office for National Statistics at the end of May 2000. He was the second head of the ONS but the first to have the title of National Statistician. He returned to New Zealand and was succeeded by Karen Dunnell in September 2005. He led the creation and publication of the National Statistics Code of Practice. Probably his most publicised act in his time in the United Kingdom came in February 2005, when as Registrar General he had to rule on the legality of the wedding of Charles, Prince of Wales and Camilla Parker Bowles.

References

External links Len Cook, Esq, CBE at Debrett's People of Today

Worked examples

Example 1 — a first encounter with Len Cook

Start with the simplest possible case. Write down what Len Cook claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Len Cook before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Len Cook ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Len Cook

In research: Len Cook appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Len Cook in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Len Cook is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1949 births, 20th-century British statisticians, 20th-century New Zealand public servants, so understanding it makes those chapters shorter.
In everyday life: Look for Len Cook outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Len Cook in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Len Cook means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Len Cook out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Len Cook in simple terms?

Why does Len Cook matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Len Cook?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Len Cook.