The Food King Chain employs more than 3,000 people. The worker's ages are approximately normally distributed, with a mean of 31 years and a standard deviation of 4.3 years. The company is thinking of introducing a health care package, and its insurance company wants to sample 31 workers before quoting a price. Calculate the probability that the sample will have an average less than 31?
Probability that the sample will have an average less than 31 has been determined.