6.  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. 4450.14 4596.62 4366.84   4455.36 4151.16 3727.41   4283.93 4527.14 4407.35   3946.01 4023.61 4221.66   ​(a) Find the sample mean.

Corporate Financial Accounting
14th Edition
ISBN:9781305653535
Author:Carl Warren, James M. Reeve, Jonathan Duchac
Publisher:Carl Warren, James M. Reeve, Jonathan Duchac
Chapter14: Financial Statement Analysis
Section: Chapter Questions
Problem 9DQ
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6. 

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.
4450.14
4596.62
4366.84
 
4455.36
4151.16
3727.41
 
4283.93
4527.14
4407.35
 
3946.01
4023.61
4221.66
 
​(a) Find the sample mean.
 
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