computer science

NQuery Sample Size Software

NQuery Sample Size Software is a computer science 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 NQuery Sample Size Software rather than just read about it. In short: nQuery is a clinical trial design platform used for the design and monitoring of adaptive, group sequential, and fixed sample size trials. It is most commonly used by biostatisticians to calculate sample size and statistical power for adaptive clinical trial design. nQuery is proprietary software developed and distributed by Statsols.

Key takeaways

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

Reference excerpt

nQuery is a clinical trial design platform used for the design and monitoring of adaptive, group sequential, and fixed sample size trials. It is most commonly used by biostatisticians to calculate sample size and statistical power for adaptive clinical trial design. nQuery is proprietary software developed and distributed by Statsols. The software includes calculations for over 1,000 sample sizes and power scenarios.

History Janet Dixon Elashoff, creator of nQuery, is a retired American statistician and daughter of the mathematician and statistician Wilfrid Joseph Dixon, creator of BMDP. Elashoff is also the retired Director of the Division of Biostatistics, Cedars-Sinai Medical Center. While at UCLA and Cedars-Sinai during the 1990s, she wrote the program nQuery Sample Size Software (then named nQuery Advisor). This software quickly became widely used to estimate the sample size requirements for pharmaceutical trials. She joined the company Statistical Solutions LLC in order to commercialize it. In June 2020, nQuery was acquired by Insightful Science.

Uses nQuery is used for adaptive clinical trial design. Trials with an adaptive design have been reported to be more efficient, informative, and ethical than trials with a traditional fixed design because they conserve resources such as time and money and often require fewer participants. nQuery allows researchers to apply both frequentist and Bayesian statistics to calculate the appropriate sample size for their study.

References

External links Official Statsols Page for nQuery

Worked examples

Example 1 — a first encounter with NQuery Sample Size Software

Start with the simplest possible case. Write down what NQuery Sample Size Software claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, 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 NQuery Sample Size Software 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 NQuery Sample Size Software 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 NQuery Sample Size Software

In research: NQuery Sample Size Software appears in computer science 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 NQuery Sample Size Software 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: NQuery Sample Size Software is common in secondary-school and first-year university syllabi. It links to neighbouring topics Sampling (statistics), Science software, Statistical software, so understanding it makes those chapters shorter.
In everyday life: Look for NQuery Sample Size Software 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 NQuery Sample Size Software in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NQuery Sample Size Software 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 NQuery Sample Size Software out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NQuery Sample Size Software in simple terms?

Why does NQuery Sample Size Software matter?

Because it connects several computer science 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 NQuery Sample Size Software?

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 NQuery Sample Size Software.