April 2015 Member Webinar: Confidence Intervals

by Karen Grace-Martin

A Science News article from July 2014 was titled “Scientists’ grasp of confidence intervals doesn’t inspire confidence.” Perhaps that is why only 11% of the articles in the 10 leading psychology journals in 2006 reported confidence intervals in their statistical analysis.

How important is it to be able to create and interpret confidence intervals?

The American Psychological Association Publication Manual, which sets the editorial standards for over 1,000 journals in the behavioral, life, and social sciences, has begun emphasizing parameter estimation and de-emphasizing Null Hypothesis Significance Testing (NHST).

Its most recent edition, the sixth, published in 2009, states “estimates of appropriate effect sizes and confidence intervals are the minimum expectations” for published research.

In this webinar, we’ll clear up the ambiguity as to what exactly is a confidence interval and how to interpret them in a table and graph format. We will also explore how they are calculated for continuous and dichotomous outcome variables in various types of samples and understand the impact sample size has on the width of the band. We’ll discuss related concepts like equivalence testing.

By the end of the webinar, we anticipate your grasp of confidence intervals will inspire confidence.


Note: This webinar is an exclusive benefit for members of the Statistically Speaking Membership Program.

About the Instructor

Jeff Meyer is a statistical consultant, instructor and writer for The Analysis Factor.

Jeff has an MBA from the Thunderbird School of Global Management and an MPA with a focus on policy from NYU Wagner School of Public Service.

Not a Member Yet?

It’s never too late to join the hottest stats club around.

Just head over to our enrollment page to sign up for Statistically Speaking.

You’ll get exclusive access to this month’s webinar live, weekly live Q&A sessions, a private stats forum, 60+ recordings of past webinars (including this one), and more.

 

 

{ 2 comments… read them below or add one }

Yvette Schlussel

This was a great presentation on Confidence Intervals. Does the webinar include content on how to evaluate confidence intervals of odds ratios and risk ratios? I would be willing to pay for membership if it does. Please let me know. Thanks,

Yvette

Reply

TAF Support

Yvette,

Thank you for asking. This webinar does include content on risk ratios. As a member, you could also submit you questions on this content to our instructors, including Jeff Meyer, via a private member forum or live Q&A sessions.

More on odds ratios and risk ratios can be found in the member webinar “Those Darn Ratios!”

-Jeremiah

Reply

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