Report says that average annual consumption of fresh fruit per person is 100 lb with the standard deviation of 30 lb. Researcher took the random sample of 49 people and had them track the fresh fruit consumption for one year.
i) Find probability that sample average will be greater than 90 lb?
ii) Find probability sample average will be between given values 95 and 105 lb?
iii) Find probability sample average will be between given values 94 and 96 lb?