If X1, . . . , Xn is a sample from a normal population having unknown parameters and 2, devise a significance level test of H0 = 2 2 0 versus the alternative H1 = 2 > 2 0 for a given positive value 2 0 .

→ CH2 Part 2 ← Section 2.3 Remember that when you looked at graphical displays of numerical data, you were interested in three characteristics: center, spread or dispersion, and shape. In this chapter we look at numerical measures that can be used to describe the same features of the data. This chapter-2 part-2 covers the following material: o Numerical measures of center: the mean, the Median, and the mode o Numerical measures of variability: the range and the standard deviation along with Variance. o Description of a set of data: the Chebyshev’s rule and box plots. ------ 09/18/2017 Quick Point Central tendency is measured in three ways: MEAN,