ABSTRACT
In the previous chapters, we have given an overview of some statistical concepts with emphasis on the location of the mean and the signicance of that mean for the experimenter. In fact, in the previous chapter, we addressed the issues of testing and condence intervals for means. In this chapter, we extend the discussion to cover tests and condence intervals for standard deviations. Specically, we are focusing on the variation of the sample and its signicance to the experimenter, by (a) introducing the testing method of the standard deviation from a random normal distribution whether or not it has a particular value that was specied on a priori basis, (b) calculating condence limits for the estimate of the standard deviation (σ), and (c) comparing two or more standard deviations.
