Each employee operates each machine for either one, two, or three different times. The dependent variable is an overall rating, which takes into account the number and quality of components produced.

A random variable is one whose value is unknown or a function that assigns values to each of an experiment’s outcomes. A random variable can be discrete or continuous.

Spectral Analysis The autocovariance function of the random variable Y t is defined as C YY (k) = E(Y t+k Y t) where EY t = 0.When the real valued process Y t is stationary and its autocovariance is ...