A confidence interval for a population mean has a margin of error of

2.7.

a. Determine the length of the confidence interval.

b. If the sample mean is

54.8,

obtain the confidence interval.

c. Construct a graph that illustrates your results.

a. The length of the confidence interval is

enter your response here.

(Type an integer or a decimal. Do not round.)

b. The confidence interval for

is from

enter your response here

to

enter your response here.

(Type integers or decimals. Do not round.)

c. Choose the correct graph below.