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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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