The output voltage of power supplies manufactured by Belkin Products is believed to follow a normal distribution. Of primary concern to the firm is the average output voltage of a particular power supply unit, believed to be 10 volts. Eighteen observations taken at random from this unit are as given below:
What is the 95% confidence interval for the average output voltage for this power supply unit?
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2011-06-25T08:05:55-0400
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