3. This is a Normal-Distribution based Sampling-Theory Problem (Chapter 8). A company claims that its, perfectly calibrated, device is subject to Normally-distributed noise, represented by a (population) mean of 0 mV and a (population) variance of 9 mV. You compile the following sample data: mean = -1 mV and variance = 8 mV, respectively, for a sample size of 25. ** You must use Sampling Theory (Chapter 8) to solve this question. Must Show All Your Work for Full Marks! (:1) Verify the company's above claim of population mean. [5 points] (b) Verify the company's above claim of population variance. IS pointsl