For a two-semester or a three-quarter calculus-based Introduction to the Mathematics of Statistics course. This classic, calculus-based introduction to the theory - and application - of statistics provides an unusually comprehensive depth and breadth of coverage and reflects the state-of-the-art in statistical thinking, the teaching of statistics, and current practices - including the use of the computer. *NEW - Places greater emphasis on the use of computers in performing statistical calculations. *NEW - Includes new exercises - many of which require the use of a computer. *NEW - Expands coverage of Analysis of Variance to include the two-way analysis-of-variance model with interaction and a discussion of multiple comparisons. *NEW - Adds appendices which summarize the properties of the special probability distributions and density functions that appear in the text. *Places greater emphasis on the use of computers in performing statistical calculations. *Comprehensive coverage of statistical theories. *Features more than 1,100 problems and exercises - divided into theory and applications.

The human brain is like one of our muscles, and like any of them, you must work constantly to not atrophy. We are used to seeing physically wellbeing more important than our own thinking, and because of that, we hardly work on our intelligence. The purpose of this book is to work that powerful "muscle". We will begin with problems that activate our brain, just like what makes a warm-up to the muscles. Then, as the reader moves forward, we will develop other important aspects, such as the use of appropriate language for problem solving, ordered reasoning, and mathematical logical thinking. Now, for this treatment to our brain to be effective, it is necessary for the reader to continue his exercise routine, once he starts, does not stop, in the end he will be able to realize that he has done a good to his mind.

We continue with the "Be Smarter" series of books. On this occasion we address one of the most important skills of thought, the so-called strategic thinking. There are many examples where strategic thinking is fundamental. Imagine that you are armed robbery, what would you do? Of course, keeping calm is paramount, but the next steps you take will mean not getting hurt. It is strategic thinking that can successfully get you out of that situation. And this is just an example. It is not easy to get the skill of strategic thinking, so the current book will help you, through fun games, to train your brain. Just like anything else, you must be consistent, read a daily chapter, practice consistently and promise you will notice the difference. Your brain will thank you.

Games have always been a part of man's life, but perhaps at the end of the previous millennium, we realized their importance mainly because of politics and economics. When two large companies fight to win buyers, they establish a game. Obviously, the more buyers a company has, the greater its profit. So on a daily basis they use strategies to win buyers. A common example is "bidding" where they lower the prices of certain products for a while, looking to attract more buyers. But think about it, if a company uses this strategy, the other company can't just sit back and do nothing, so it will be forced to counteract the other company's move. In other words, a game is established between them. The same thing happens in politics when several opponents look for the population to vote for them, each one performs a strategy seeking to obtain the largest number of voters. If you think about it a little, you will see that games are in your daily life. When you are looking for a strategy to make your time at work as short as possible (you are competing against others who are looking for the same thing and can affect your commute to work), when you want to "force" your children to do housework, when you are thinking about negotiating a salary increase, and so on. The purpose of this book is to introduce you to the world of games, but from a formal perspective. We will start by looking at examples of games and strategies for winning them, and then formalize these definitions in chapters 2 and 3.

In the present text, we present a brief introduction to non-Euclidean geometries. We begin by presenting the foundations of classical geometry, and the discussion that gave rise to other geometries. There is an incredibly old example of an attempt to demonstrate the fifth postulate of Euclid due to Proclus, and part of Sacheri's work is retaken, to continue later with the achievements of Lobachevsky. In simple terms, the geometry to which we are accustomed, which is what we are taught from the basic studies, is the so-called classical geometry, which follows certain ideas that are taken as true facts and from there builds the veracity of other facts. In particular, the fifth postulate establishes the existence of lines that are called parallel, which are those that are never intercepted. Geometry arose from the need to understand the world around us, and from there arose the axioms of Euclidean geometry, but they were not entirely accurate. For example, in art we see that parallel lines are sometimes represented as intercepting lines on the horizon, at the so-called vanishing point. Apart from the non-Euclidean geometries we see other examples of geometry, the so-called friezes and mosaics. We conclude the book with a brief notion of topology and algebraic geometry.

Introducción a la lingüística hispánica actual is the ideal introduction to Spanish linguistics for all undergraduate and postgraduate students of Spanish. No prior knowledge of linguistics is assumed as the book takes you step-by-step through all the main subfields of linguistics, both theoretical and applied. Phonology. morphology, syntax, semantics, pragmatics, second language acquisition, history of the Spanish language, dialectology and sociolinguistics are concisely and accurately outlined providing a comprehensive foundation in the field. A comprehensive companion website provides a wealth of additional resources including further exercises to reinforce the material covered in the book, extra examples to clarify the most difficult concepts, extensive audio clips which reproduce the sounds of phonemes and allophones and sonograms. Written in a clear and accessible manner with extensive auxiliary materials, Introducción a la lingüística hispánica actual has been specially designed for students of Spanish with little or no linguistic background who need to understand the key concepts and constructs of Spanish linguistics.