Provide an appropriate response.
-A confidence interval for a population mean has a margin of error of 2.2. If the sample mean is 51.3, obtain the confidence interval.
A)From 49.1 to 53.5
B)From 51.3 to 53.5
C)From 49.1 to 51.3
D)From 50.2 to 52.4

Question

Provide an appropriate response.
-A confidence interval for a population mean has a margin of error of 2.2. If the sample mean is 51.3, obtain the confidence interval. 
A)From 49.1 to 53.5
B)From 51.3 to 53.5
C)From 49.1 to 51.3
D)From 50.2 to 52.4

Quizplus · Accepted Answer

The confidence interval is calculated by subtracting and adding the margin of error from/to the sample mean. Thus, 51.3 - 2.2 = 49.1 and 51.3 + 2.2 = 53.5, forming the interval from 49.1 to 53.5.

Provide an Appropriate Response