Question: The U.S. average for state and local taxes for a family of four is $4251. A random sample of 20 families in a northeastern state

The U.S. average for state and

local taxes for a family of four is $4251. A random

sample of 20 families in a northeastern state indicates

that they paid an annual amount of $4654 with a

standard deviation of $950. At a=0.1, is there

sufficient evidence to conclude that they pay more than

the national average of $4251?

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