Inference 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
Student t distribution
Graphical Comparison of t and Z Multipliers
Tabular Comparison of t and Z Multipliers
Back to our CI example!
That is...
T-Interval for Mean in Minitab
T- interval in Minitab
And to our HT example!
T-test for Mean in Minitab
T- test in Minitab
What happens as sample gets larger?
One not-so-small problem!
Strategy
Email: lsimon@stat.psu.edu
Home Page: http://www.stat.psu.edu/~lsimon/stat250/fa99/admin/
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