Your browser doesn't support the features required by impress.js, so you are presented with a simplified version of this presentation.

For the best experience please use the latest Chrome, Safari or Firefox browser.

STAT 301 Lab

Lab 2: Type of Bias

T.A.: Yixuan Qiu

Reminder

Recall how many texts you sent last week
Fill in the table on the front computer
Pick up handout and your previous lab paper
Open Blackboard and download SPSS instructions
Slides at http://statr.me/courses.html

Population and Sample

Population
- The entire group
Sample
- Part of the population, gather information for the population

Type of Bias

Undercoverage
- Some groups left out?
Nonresponse
- Get the response or not?
Response Bias
- Response accurate or not?