Show Summary Details
Page of

Statistical concepts 

Statistical concepts
Statistical concepts

Helen Ward

, Mireille B. Toledano

, Gavin Shaddick

, Bethan Davies

, and Paul Elliott

Page of

PRINTED FROM OXFORD MEDICINE ONLINE ( © Oxford University Press, 2016. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 18 October 2019

Introduction 218

Data and variables 220

Summarizing sample data 222

Measures of central location 224

Measures of dispersion 226

Sampling variability 228

Probability distributions 230

Confidence intervals 232

Hypothesis tests 234

Statistical or clinical significance 238

Sample size and power calculations 240

When to consult a statistician ...

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.