The mean output of a certain type of amplifier is December 27, 2016 By Essaypros The mean output of a certain type of amplifier is 183 watts with a variance of 121. If the 78 amplifiers are sampled what is the mean of the sample would be greater than 181.2 watts. We Deliver Top Quality On Time As Promised! Ready to get started? Just click the button to be directed to a secure page so you can enter the details of your paper.