<-- Enter Confidence Interval, example 1,9
  

Calculate the margin of error and sample mean for a confidence interval of (2,10)

Calculate interval size:

Interval Size = 10 - 2
Interval Size = 8

Calculate the margin of error:

Margin of Error  =  ±Interval Size
  2

Margin of Error  =  ±8
  2



Margin of Error = ±4


Calculate sample mean:

The sample mean is just the midpoint of the confidence interval
Sample Mean x  =  Interval Size
  2

Sample Mean x  =  10 + 2
  2

Sample Mean x  =  12
  2

Sample Mean x = 6


What is the Answer?
Margin of Error = ±4
How does the Margin of Error from Confidence Interval Calculator work?
Free Margin of Error from Confidence Interval Calculator - Given a confidence interval, this determines the margin of error and sample mean.
This calculator has 1 input.

What 2 formulas are used for the Margin of Error from Confidence Interval Calculator?

Interval Size = x2 - x1
Margin of Error = ±Interval Size/2

For more math formulas, check out our Formula Dossier

What 3 concepts are covered in the Margin of Error from Confidence Interval Calculator?

confidence interval
a range of values so defined that there is a specified probability that the value of a parameter lies within it.
margin of error
a statistic expressing the amount of random sampling error in the results of a survey.
σp + z-score
mean
A statistical measurement also known as the average
Example calculations for the Margin of Error from Confidence Interval Calculator

Margin of Error from Confidence Interval Calculator Video


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