Its a great resource for statistis, it includes vast range of topics  including Diagrammatic Representation of Data,  Graphic Representation of Data, Measures of Central Tendency,  Measures of Dispersion ,  Exact Sampling Distributions (t, F and Z Distributions),  Exact Sampling Distributions (Chi-Square Distribution), Multiple Regression and Correlation,  Hypothesis Testing,  Theory of Estimation etc.. Everything is explained with great detail.