Calculate the margin of error and sample mean for
a confidence interval of (60,66)
Calculate interval size:
Interval Size = 66 - 60
Interval Size = 6
Calculate the margin of error:
| Margin of Error = | ±Interval Size |
| 2 |
| Margin of Error = | ±6 |
| 2 |
Margin of Error = ±3
Calculate sample mean:
The sample mean is just the midpoint of the confidence interval
| Sample Mean x = | Interval Size |
| 2 |
| Sample Mean x = | 66 + 60 |
| 2 |
| Sample Mean x = | 126 |
| 2 |
Final Answers
Margin of Error = ±3
