A Researcher Wants to Estimate the Mean Cholesterol Level of People

A researcher wants to estimate the mean cholesterol level of people in his city.He sets up a walk-in clinic,and measures the cholesterol of 85 people,finding a mean level of 224 and a standard deviation of 8.Have the conditions and assumptions for inference been met?

A) No,the sample does not meet the Nearly Normal condition.
B) No,the sample is more than 10% of the population.
C) Yes,all conditions and assumptions have been met.
D) No,the the sample data is likely to be skewed.
E) No,the sample is not random.