 # Chapter 4 Sampling Distributions and Data Descriptions.

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Chapter 4 Sampling Distributions and Data Descriptions

Section 4.1 Random Sampling

Section 4.2 Some Important Statistics

Section 4.3 Sampling Distributions

Section 4.4 Sampling Distribution of Means and the Central Limit Theorem

Figure 4.1 Illustration of the Central Limit Theorem (distribution of X for n = 1, moderate n, and large n) _ Copyright © 2013 Pearson Education. All rights reserved.

Figure 4.2 Area for Example 4.4

Figure 4.3 Area for Case Study 4.1

Figure 4.4 Area for Example 4.5

Figure 4.5 Area for Case Study 4.2

Section 4.5 Sampling Distribution of S2

Figure 4.6 The chi-squared distribution

Section 4.6 t-Distribution

Figure 4.7 The t-distribution curves for v = 2, 5, and

Figure 4.8 Symmetry property (about 0) of the t-distribution

Figure 4.9 The t-values for Example 4.9

Section 4.7 F-Distribution

Figure 4.10 Typical F-distributions

Figure 4.11 Illustration of the fa for the F-distribution

Section 4.8 Graphical Presentation

Table 4.1 Tensile strength

Figure 4.12 Scatter plot of tensile strength and cotton percentages

Table 4.3 Stem-and-Leaf Plot of Battery Life

Table 4.4 Double-Stem-and-Leaf Plot of Battery Life

Table 4.5 Relative Frequency Distribution of Battery Life

Figure 4.13 Relative frequency histogram

Figure 4.14 Estimating frequency distribution

Figure 4.15 Skewness of data

Table 4.6 Nicotine Data for Example 4.12

Figure 4.16 Box-and-whisker plot for Example 4.12