The monthly incomes for 12 randomly selected​ people, each with a​ bachelor's degree in​ economics, are shown on the right. Complete parts​ (a) through​ (c) below.   Assume the population is normally distributed.   4450.02 4596.26 4366.07 4455.49 4151.29 3727.13 4283.94 4527.24 4407.67 3946.45 4023.59 4221.11   (a) Find the sample mean.   x=enter your response here ​(Round to one decimal place as​ needed.)

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