‌

Chi-squared test

‌‌
‌
‌
‌‌‌‌‌‌‌‌‌‌

High Yield Notes

3 pages

Flashcards

Chi-squared test

of complete

Questions

USMLE® Step 1 style questions USMLE

of complete

USMLE® Step 2 style questions USMLE

of complete

A study was conducted at a large medical center to assess the association between rotavirus vaccine and the incidence of intussusception in pediatric patients. The patients were randomized into groups that either received the trial vaccine or a placebo injection. Data from the study is presented below. Which of the following analysis methods would be most appropriate to assess the statistical significance of these results?  


Intussusception within 6 months
No intussusception within 6 months
Total studied
Vaccine administered  
4216711092
Vaccine not administered
263524787

7841195

External Links

Summary

The chi-squared test is a statistical method used to test the independence of two categorical variables. The chi-squared statistic is calculated as the sum of the squared differences between the observed and expected frequencies for each category, divided by the number of degrees of freedom.

Company

About us

Careers

Library

Press

Editorial Board

Blog

Support

Latest on COVID-19

Help center

Contact us

FAQ

For Institutions

Medicine (DO)

Medicine (MD)

Nurse Practitioner (NP)

Physician Assistant (PA)

Dentistry

Nursing (RN)

More

Plans

iOS app

Android app

Swag

Create custom content

Raise the Line Podcast

Elsevier

Copyright © 2024 Elsevier, its licensors, and contributors. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Cookies are used by this site.

Terms and Conditions

Privacy Policy

Cookie Notice

Sitemap

USMLE® is a joint program of the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME). COMLEX-USA® is a registered trademark of The National Board of Osteopathic Medical Examiners, Inc. NCLEX-RN® is a registered trademark of the National Council of State Boards of Nursing, Inc. Test names and other trademarks are the property of the respective trademark holders. None of the trademark holders are endorsed by nor affiliated with Osmosis or this website.

RELX