STAT 3743 Daily Outline
Up there should be four (4) files:
-
STAT3743_xxxxxx.3gp(video for mobile phones) -
STAT3743_xxxxxx.ogv(video in Ogg format) -
STAT3743_xxxxxx.pdf(scanned lecture transcript) -
STAT3743_xxxxxx.webm(video in WebM format)
The WebM video is definitely the highest quality, but
you need a compatible browser/player to watch it.
See How to watch the video for instructions to get one.
More about p-values
Standard error of the sample mean
Standard errors in general
For variances
Tests of hypothesis for a variance
Example: salary from RcmdrTestDrive
How to do it with R
sigma.test from the TeachingDemos package
For two means and/or two variances
For two means
Independent two-sample t-test (pooled)
Example: mean before by smoking in RcmdrTestDrive
Remarks
- two-sample z-test
- large sample approximation
For two variances
Two-sample F-test
Example: variance of before by smoking in RcmdrTestDrive
How to do it with R
var.test from base R
Date: 2010-12-03 15:01:17 EST
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