Find the Confidence Interval Specified

Find the confidence interval specified. Assume that the population is normally distributed.
-A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 188 milligrams with s = 12.7 milligrams. Construct a 95% confidence interval for the true mean
Cholesterol content of all such eggs.

A) 179.8 to 196.2 milligrams
B) 181.4 to 194.6 milligrams
C) 179.9 to 196.1 milligrams
D) 180.0 to 196.0 milligrams

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