statistics
posted by Anonymous on .
9) A 95% confidence interval for the true mean cholesterol of adult males based on 25 randomly selected subjects extends from 175 mg/L to 250 mg/L. A proper interpretation of the confidence interval would be that:
A) 95% of the population has a cholesterol level between 175 and 250 mg/L.
B) We are 95% confident that the true mean cholesterol level of the population falls between 175 and 250 mg/L.
C) There is a 95% chance that a randomly selected individual has a cholesterol level that falls between 175 and 250 mg/L.
D) None of the above

man cholesterol is 175mg/dl , standard deviation 20mg/dl..approximate normal distribution..what percentage has cholesterol above 155mg/dl? thanks..