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About 10,000 employees of the Internal Revenue Service were brought back to 10 offices last Monday....

About 10,000 employees of the Internal Revenue Service were brought back to 10 offices last Monday. The IRS claims that the standard deviation of the lengths of time it takes an incoming phone call to be transferred to the correct office is less than 10 minutes. A random sample of 25 incoming phone calls has a standard deviation of 9 minutes. At α = 0.1, is there enough evidence to support the IRS’s claim?

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