Question: The output voltage for a certain electric circuit has a normal distribution. A sample of 8 independent readings ( *) on the voltage are

The output voltage for a certain electric circuit has a normal distribution.

The output voltage for a certain electric circuit has a normal distribution. A sample of 8 independent readings ( *) on the voltage are given as follows: 29, 26, 22, 35, 31, 25, 32, 24. For the sake of convenience, you can use the following results: 1. Construct a 95% confidence interval for the mean of the output voltage. 2. Construct a 95% upper confidence interval for the mean of the output voltage. 3. What is a 95% confidence interval for the variance of the output voltage? 224, w = 6412.

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