Calculate the margin of error and sample mean for
a confidence interval of (1,9)
Calculate interval size:
Interval Size = 9 - 1
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 = | 9 + 1 |
| 2 |
| Sample Mean x = | 10 |
| 2 |
Final Answers
Margin of Error = ±4
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.
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
Margin of Error = ±Interval Size/2
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
