Table of Contents
Confidence Interval for a Mean
As long as you have a “large” sample….
Example
What happens if you can only take a “small” sample?
If you have a “small” sample...
Student’s t distribution versus Normal Z distribution
T distribution
Let’s compare t and Z values
OK, enough theorizing! Let’s get back to our example!
That is...
What happens as sample gets larger?
What happens to CI as sample gets larger?
Example
One not-so-small problem!
Strategy for deciding how to analyze
PPT Slide
Z interval in Minitab
t interval in Minitab |
Author: Laura J. Simon
Download original powerpoint presentation |
