- #1
Deathfish
- 86
- 0
My course notes and textbook express this differently:
To construct the confidence interval for diff. between means,
Course notes
([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex])[itex]\pm[/itex]E
Textbook
([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) - E < [itex]\mu[/itex]1 - [itex]\mu[/itex]2 < ([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) + E
why the difference?
To construct the confidence interval for diff. between means,
Course notes
([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex])[itex]\pm[/itex]E
Textbook
([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) - E < [itex]\mu[/itex]1 - [itex]\mu[/itex]2 < ([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) + E
why the difference?