1 It is known that the red blood cell count of adults in a particular country, measured in suitable units, has mean 4.96 and variance 0.15.
- Find the probability that the mean red blood cell count of a random sample of 50 adults from this country is at least 5.00.
- Explain how you can find the probability in part (a) despite the fact that you do not know the distribution of red blood cell counts.