Training Calendar

What Sample Size do I need? With Stata (online)

Online 1 day (8th October 2020 - 8th October 2020) Stata Advanced, Intermediate
Delivered by: James Gallagher; Sandro Leidi

Course Overview

Presented by James Gallagher and Sandro Leidi

Choosing an appropriate sample size is a common problem and should be given due consideration in any research proposal, as an inadequate sample size invariably leads to wasted resources.

This course gives a practical introduction to sample size determination in the context of some commonly used significance tests.

Examples from a scientific background are used to highlight the problems associated with sample size determination and suggest potential solutions.

Formulae and algebraic notation are kept to a minimum.

Course Agenda

Session 1

The concepts of significance and power in relation to hypothesis testing. Introduction to the role of power in sample size determination.

Session 2

Continuous outcomes: comparing a mean to a target. One-sample t-test. Introduction to the -power- command and its options.

Session 3

Continuous outcomes: comparing two means. Two-sample t-test for independent samples and for paired samples.

Session 4

Binary outcomes: comparing a proportion to a target. One-sample z-test.

Session 5

Binary outcomes: comparing two proportions. Two-sample z-test for independent samples. McNemar’s test for paired samples.


Delegates are assumed to be Stata users and to be familiar with the concepts of statistical hypothesis testing in relation to means and proportions.


Julious SA (2009) Sample size for clinical trials. CRC Press.

Chow, S-C., Shao, J., Wang, H. and Lokhnygina, Y. (2018). Sample size calculations in clinical research. 3rd edition. CRC Press.

Terms & Conditions

  • Student registrations: Attendees must provide proof of full time student status at the time of booking to qualify for student registration rate (valid student ID card or authorised letter of enrolment).
  • Additional discounts are available for multiple registrations.
  • Delegates are provided with temporary licences for the software(s) used in the course and will be instructed to download and install the software prior to the start of the course.
  • Payment of course fees required prior to the course start date.
  • Registration closes 5-calendar days prior to the start of the course.
    • 100% fee returned for cancellations made over 28-calendar days prior to start of the course.
    • 50% fee returned for cancellations made 14-calendar days prior to the start of the course.
    • No fee returned for cancellations made less than 14-calendar days prior to the start of the course.

The number of delegates is restricted. Please register early to guarantee your place.

  •  CommercialAcademicStudent
    8 October 2020 (08/10/2020 - 08/10/2020)

All prices exclude VAT or local taxes where applicable.

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