A Random Sample of 17 Hotels in Boston Had an Average

A random sample of 17 hotels in Boston had an average nightly room rate of $165.40 with a sample standard deviation of $21.70. The 90% confidence interval around this sample mean is___ .

A) ($144.32, $186.32)
B) ($162.76, $168.04)
C) ($152.22, $178.58)
D) ($156.20, $174.60)