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A random sample of nine local banks shows their deposits (in billions of dollars) 3 years ago and their deposits (in billions of dollars) today.

A random sample of nine local banks shows their deposits (in billions of dollars) 3 years ago and their deposits (in billions of dollars) today. At = 0.05, can it be concluded that the average in deposits for the banks is greater today than it was 3 years ago? Use = 0.05. Assume the variable is normally distributed.

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