A Fisherman keeps precise records of his catches and he knows that the average length of a striped bass he has caught is 25 inches with standard deviation (sigma) = 2.7 inches. From a sample of 40 striped bass he caught this year he found. Sample Mean (X = 23.7 inches). Does it seem like the average length of a striped bass has decreased? Alpha= 0.01

(In addition to the solution Please explain the hypothesis and conclusion section if and why are you using >, <, = or not equal to)