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The average local cell phone call length was reported to be 2.27 minutes. A random sample of 20 phone calls showed an average of 298

The average local cell phone call length was reported to be 2.27 minutes. A random sample of 20 phone calls showed an average of 298 minutes in length with a standard deviation of 0.98 minute. At a = 0.025 can it be concluded that the average phone call length has decreased?

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