1. Chapter 11 Module - Non-Sample Error
Simple CASRO Formula
Example #1
Total Number of Units in Sample: 1,000
Completed Surveys: 750
Response Rate =
Example #2
Total Number of Units in Sample: 600
Completed Surveys: 500
Response Rate =

2. CASRO expanded response rate formula:
Example #1
Completions: 400
Ineligible: 300
Refusals: 100
Not Reached: 200
Response Rate:
Example #2
Completions: 500
Ineligible: 200
Refusals: 100
Not Reached: 100
Response Rate:
Homework #1
Completions: 1,000
Ineligible: 150
Refusals: 50
Not Reached: 25
Response Rate:
Homework #2
Completions: 1,500
Ineligible: 75
Refusals: 50
Not Reached: 50
Response Rate: