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
