A medical clinic in a small city in the state of Washington wants to estimate the mean serum cholesterol level (measured in mg of cholesterol per 100 mL of blood) of teenage males. Based on the following summary data taken from a random sample of 36 teenage males from this community, compute a 95% confidence interval for the mean serum cholesterol level of teenage males in this city. Assume that the sample was taken from a normal distribution. Round your confidence limits to 2 decimal places. Summary Data: n = 36, x¯=230, s = 12
A.
(207.15, 240.67)

B.
(209.12, 238.01)

C.
(210.12, 239.56)

D.
(226.08, 233.92)

E.
None of the above