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Statistical concepts 

Statistical concepts
Chapter:
Statistical concepts
Author(s):

Helen Ward

, Mireille B. Toledano

, Gavin Shaddick

, Bethan Davies

, and Paul Elliott

DOI:
10.1093/med/9780198529880.003.0009
Page of

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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 ...

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