中山大学心理统计学课件Lecture1

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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
About the book
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Section C: Optional material. More conceptually advanced and less central to your needs than the topics covered in Section A and B. Each of the three sections ends with a detailed summary, and the chapter ends with an annotated list of all the major formulas in the chapters.
%nÚOÆ(Statistics Methods for Psychology)
About the book
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Each chapter is divided into three sections, labeled A, B, and C. Section A: Conceptual foundation. Simplest case of the procedure dealt with in that chapter and explain the definitional formulas so that you can gain some insight into why and how statistical formulas work. Section A has its own exercises to help ensure that you grasp the basic concepts and definitional formulas before moving on to the complications of Section B.
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
What is(are) statistics?
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One part of applied statistics is concerned only with summarizing the set of data that a researcher has collected; this is called descriptive statistics, £ã5ÚO. For example: mean of the final exam However, most psychological research involves relatively small groups of people from which inferences are drawn about the larger population; this is called inferential statistics, íä5Ú O. For example: will students sitting in the front have better scores than those sitting in the back?
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
About the book
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Section B: Basic statistical procedures. It presents the more general case of that chapter’s procedure and includes computational formulas, significance tests, and comments on research design so that you will be equipped to analyze real data and interpret your results. Section B also includes supplementary statistical procedures and information on how to report such statistical results. It has a variety of exercises so that you can practice the basic computations.
%nÚOÆ(Statistics Methods for Psychology)
Lecture 1: Introduction to psychological statistics
Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
What is(are) statistics?
As part of mathematics, statistics has a theoretical side that can get very abstract. However, This text only deals with applied statistics. It describes methods for data analysis that have been worked out by statisticians, but does not show how these methods were derived from more fundamental mathematical principles. In this class, statistics refer to statistical methods that are commonly applied to the analysis of psychological data. They have been chosen because they are not only commonly used but are also simple to explain.
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
What is(are) statistics?
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What is statistics? or What are statistics? Statistics are observations organized into numerical form. (Ú Oêâ) Statistics refers to a branch of mathematics that is concerned with methods for understanding and summarizing collections of numbers. (ÚOÆ) There is a third meaning for the term statistics, which distinguishes a statistic from a parameter. (ÚOþ)
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
Statistics and Research
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The effect of the milk to be small and noticeable only after averaging the time it takes a number of participants to fall asleep (the sleep latency) and comparing that to the average for a (control) group that does not get the milk. Descriptive statistics is required to demonstrate that there is a difference between the two groups. Inferential statistics is needed to show that if the experiment were repeated, it would be likely that the difference would be in the same direction.
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Statistical methods play a critical role in most types of psychological research. For example, suppose you wanted to known whether a glass of warm milk at bedtime will help insomniacs(” š ‡ ö) get to sleep faster. In this case, you don’t expect the warm milk to knock out(¦\Z) any of the subjects, or even to help every one of them.
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þ‘žm: (Ïo3-5! þ‘/:: C403 áµ Barry H.Cohen Explaining Psychological Statistics, 3rd Edition. John Wiley & Sons, Inc. 2008.
Lecture 1: Introduction to psychological statistics
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
Statis来自百度文库ics and Research
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Why a course in statistics is required for psychological students?
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Lecture 1: Introduction to psychological statistics
%nÚOÆ(Statistics Methods for Psychology)
What is(are) statistics?
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In this class, we begins with a presentation of several procedures that are commonly used to create descriptive statistics. Although such methods can only be used to describe data, it is quite common to use these descriptive statistics as the basis for inferential procedures. The bulk of this text is devoted to some of the most common procedures of inferential statistics.