The Practice of Statistics Third Edition Chapter 12: Significance Tests in Practice Copyright © 2008 by W. H. Freeman & Company Daniel S. Yates.

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Presentation transcript:

The Practice of Statistics Third Edition Chapter 12: Significance Tests in Practice Copyright © 2008 by W. H. Freeman & Company Daniel S. Yates

Assuming conditions were met should we reject Ho?

Can you locate the p-value on the Fathom output?

Assuming conditions were met what is the CI? Should we reject Ho? How do the results of the CI and the Significance Test compare?

CAREFUL! Excel labels MOE as Confidence Level  Assuming conditions were met what is the CI?

Example 12.5 Average Time to Complete a Maze Paired t Test Each subject was asked to do a maze, 3 times with a floral- scented mask, 3 times with an unscented mask. Order was randomized to control for a learning effect. The difference in the average times was is our data. (Unscented – Scented)

What are Ho and Ha? Should we reject Ho? What is the CI? Does it agree?

How does this differ from the other output?

Can you locate the p-value on the Fathom output?