What are the null and alternative hypotheses for given test

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Reference no: EM131408011

Each of fifteen 60-watt lightbulbs has been randomly placed into an outlet for which the voltage is 3 volts below the line voltage, 2 volts below the line voltage, or equal to the line voltage. The following data are the lifetimes of the bulbs, expressed in days of continuous use.

Three volts below line	58	63	46	57	51
Two volts below line	46	59	51	46	42
Equal to line voltage	52	48	38	48	42

a. What are the null and alternative hypotheses for this test?

b. Use ANOVA and the 0.01 level of significance in testing the null hypothesis identified in part (a).

c. For each sample, construct the 95% confidence interval for the population mean.

Reference no: EM131408011

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