The average income in Connecticut in 2013 was $60,000 per person per year. Suppose the standard deviation
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a. Why is the distribution Normal and not right-skewed like the population?
b. Why is the z-score 2?
c. What is the probability that the sample mean will be more than $3000 away from the population mean?
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a It is Normal because the sample size is large n 400 25 b c ...View the full answer
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Related Book For 
Introductory Statistics Exploring The World Through Data
ISBN: 9780321978271
2nd Edition
Authors: Robert Gould, Colleen Ryan
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