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11. A company manufactures mobiles chargers with an output voltage of 5V and variance 0.5V2. The company wants to test the variance. They take

11. A company manufactures mobiles chargers with an output voltage of 5V and variance 0.5V2. The company wants to test the variance. They take a random sample of 12 chargers and the following voltages are obtained: 5.34, 5.65, 4.76, 5.00, 5.55, 5.54, 5.07, 5.35, 5.44, 5.25, 5.35, 4.61 Test the hypothesis that (a) Accept Ho (b) Reject Ho = 0.5 at 0.05 level of significance.

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