Get your own playlist at snapdrive.net!
The professor is saying about sampling error. It is records the chance of errror in heritent study. He explain the 2 recent surveys for example.
First, one day a scientist treid to determine average size of fish in local lake. but because he used too big net, he caught only big fish and he couldn't measure average size.
Another example is about political survey. Because the survey done in afternoon, the gap was ahead 12 points. It's example of larger and usual sampling error.
No comments:
Post a Comment