The owner of Brittens Egg Farm wants to estimate the mean number of eggs produced per chicken. A sample of 20 chickens shows they produced an average of 20 eggs per month with a standard deviation of 2 eggs per month. (Use tDistribution Table.)

a-1. What is the value of the population mean? It is unknown. 25 20 a-2. What is the best estimate of this value? Answer is complete and correct. Answer is complete and correct. d. What is the margin of error? (Round your answer to 2 decimal places.)