This e-book is designed to help students understand and apply statistical methods concept. It focuses more on parametric methods, with additional of some non-parametric methods. The two-core discussion of inferential statistics, namely interval estimation and hypothesis testing for three main parameters – mean, variance and proportion are the focal of this e-book. The application of normal distribution, t-distribution, chi-square distribution and F-distribution is widely used in the discussion. For the non-parametric method, the topics discussed are the Sign Test, Wilcoxon Signed-Rank Test, Mann-Whitney and Chi Square Test of Independence. The examples and exercises were adopted from the final exam questions of Universiti Teknologi MARA. It is hoped that readers would gain benefit from this first edition of statistical methods e-book.