Use the Confidence Level and Sample Data to Find a Confidence

Multiple Choice

Use the confidence level and sample data to find a confidence interval for estimating the population µ.
-A laboratory tested 90 chicken eggs and found that the mean amount of cholesterol was 230 milligrams with $\sigma = 16.0$ milligrams. Construct a 95 percent confidence interval for the true mean cholesterol content, $\mu$ , of all such eggs.

A) $227 < \mu < 233$
B) $226 < \mu < 232$
C) $228 < \mu < 234$
D) $226 < \mu < 233$