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SCENARIO 8-4 The Actual Voltages of Power Packs Labeled as 12 Volts

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SCENARIO 8-4
The actual voltages of power packs labeled as 12 volts are as follows: 11.77,11.90,11.64,11.84,12.13,11.99,and 11.77.
-Referring to Scenario 8-4,a 99% confidence interval for the mean voltage of the power packs is from_____ to_____ .

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