The output voltage for a certain electric circuit

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The output voltage for a certain electric circuit is specified to be 130. A sample of 40 independent readings on the voltage for this circuit gave a mean of 128.6 and a standard deviation of 2.1.Test the hypothesis that population mean output voltage is 130 against the alternative that it is less than 130. Use a significance level of .05

Reference no: EM13295442

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