Confidence Intervals Using a Formula
View the Lesson | MATHguide homepage Updated March 21st, 2018


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Problem: The owner of a business surveyed 235 customers. 61% of the customers surveyed say they are satisfied with the services they received from the business. Calculate a 95% margin of error and confidence interval for this survey using the formula below.

Round your responses to the nearest hundredth.

 
      Formula for Margin of Error
 
Solution:
Margin of Error:%

Low EndHigh End
[%,%]