Calculate Margin of Error for a confidence interval of (1,9)

<-- Enter Confidence Interval, example 1,9

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

Sample Mean x = 5