Answer
a. 233.4 sec < $\mu$ < 256.65 sec
b. Best point estimate of m is
245.025 sec. The margin of error
is E = 11.625 sec.
Work Step by Step
a. 233.4 sec < $\mu$ < 256.65 sec
b. Best point estimate of m is
245.025 sec. The margin of error
is E = 11.625 sec.