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This book addresses sample size and power in the context of research, offering valuable insights for graduate and doctoral students as well as researchers in any discipline where data is generated to investigate research questions. It explains how to enhance the authenticity of research by estimating the sample size and reporting the power of the tests used. Further, it discusses the issue of sample size determination in survey studies as well as in hypothesis testing experiments so that readers can grasp the concept of statistical errors, minimum detectable difference, effect size, one-tail and two-tail tests and the power of the test. The book also highlights the importance of fixing these boundary conditions in enhancing the authenticity of research findings and improving the chances of research papers being accepted by respected journals. Further, it explores the significance of sample size by showing the power achieved in selected doctoral studies. Procedure has been discussed to fix power in the hypothesis testing experiment. One should usually have power at least 0.8 in the study because having power less than this will have the issue of practical significance of findings. If the power in any study is less than 0.5 then it would be better to test the hypothesis by tossing a coin instead of organizing the experiment. It also discusses determining sample size and power using the freeware G*Power software, based on twenty-one examples using different analyses, like t-test, parametric and non-parametric correlations, multivariate regression, logistic regression, independent and repeated measures ANOVA, mixed design, MANOVA and chi-square.
This book highlights the effects of power within the higher educational process, and argues that in order to understand the student experience we have to take seriously the institution as a context for learning. It considers key questions such as: Why is the student experience of higher education sometimes negative or restricted? How does power operate within the institution? What are the forces that limit or enable student agency? How can institutions of higher education create conditions which best support more enabling forces? Higher Education has its own particular culture, social relations and practices, governed by social and discursive norms. It is always implicated in relations of power through its function in society and its effects on individuals. This book considers how, for the student, these effects can be enabling and engaging, or limiting and diminishing. In exploring the effects of the institutionalization of learning and the workings of power implicated within this, it sets out to add to more cognitive and pedagogic ways of understanding student experience in higher education. Study, Power and the University provides key reading for educational researchers and developers, academics and higher education managers.
Statistical Power Analysis is a nontechnical guide to power analysis in research planning that provides users of applied statistics with the tools they need for more effective analysis. The Second Edition includes: * a chapter covering power analysis in set correlation and multivariate methods; * a chapter considering effect size, psychometric reliability, and the efficacy of "qualifying" dependent variables and; * expanded power and sample size tables for multiple regression/correlation.
From New York Times Bestselling Author Maria V. Snyder Choose: a quick death… or slow poison… Locked deep in the palace dungeon for killing her abuser, Yelena knows she’ll never be free again. The laws in Ixia are strict, and murderers must be executed, no matter the reason. But just as she’s resigned herself to her fate, she’s offered an extraordinary reprieve. As the food taster, Yelena will eat the best meals, have rooms in the palace—and risk assassination by anyone trying to kill the Commander of Ixia. To make matters worse, the chief of security deliberately feeds her Butterfly’s Dust, and only by appearing for her daily antidote will she delay an agonizing death from the poison. As Yelena tries to escape her new dilemma, disasters keep mounting. Rebels plot to seize Ixia and Yelena develops magical powers she can’t control. Her life is threatened again, and in order to survive, she must unravel the secrets behind the past she’s been running from. The Chronicles of Ixia Series by Maria V Snyder Book One: Poison Study Book Two: Magic Study Book Three: Fire Study Book Four: Storm Glass Book Five: Sea Glass Book Six: Spy Glass Book Seven: Shadow Study Book Eight: Night Study Book Nine: Dawn Study
'Kerry Brown's Xi is the perfect primer for understanding Xi Jinping's status as China's greatest ruler since Mao and as this century's least assailable statesman' John Keay, author of China: A History 'A valuable primer for anyone looking to get up to speed on Xi Jinping's rise to global power' Jeff Wasserstrom, Guardian 'Offers a nuanced and thorough explanation of Xi's China and why the Communist Party, for all its flaws, has long life in it' Oliver Farry, Irish Times Although Xi Jinping came to power a decade ago, he remains an enigmatic figure in the West. His priority has always been to keep Chinese society as stable as possible, steering a course through a period of astounding economic growth, while ensuring that nothing challenges the political status quo. But with unrest stirring in Hong Kong, reports of human rights abuses taking place in the Xinjiang region and, devastatingly, the outbreak of a virus that would change the world, suddenly understanding Xi's China is more important than ever before. In this short and timely book, academic and author Kerry Brown examines the complexities behind the man, explaining the impact that his rule is already having on the West. But who is Xi really, and what is his vision for China's future? And, crucially, what does that mean for the rest of the world?
Nowadays distributed energy resources (DER) can provide certain reactive power flexibility for voltage support in alternating current power systems. Besides local voltage support at the distribution level, the DER can also provide reactive power flexibility at the transmission-distribution (T-D) interface, which can improve the reactive power grid adequacy of the distribution level. The term reactive power grid adequacy describes the compliance level of a distribution grid with a predefined reactive power range at the T-D interface. However, a challenge in grid planning procedures is the consideration of the usually intermittent reactive power flexibility potential by the DER. This study aims to develop practicable grid planning procedures for advanced reactive power management at the T-D interface by making use of controllable reactive power sources at the distribution level, like DER and distributed reactive power compensators. The study is performed for a real German distribution grid section with very high-distributed generation.
