New PDF release: An Introduction to Statistical Concepts

By Debbie L. Hahs-Vaughn, Richard G. Lomax

ISBN-10: 041588005X

ISBN-13: 9780415880053

This complete, versatile textual content is utilized in either one- and two-semester classes to study introductory via intermediate facts. teachers pick out the subjects which are most excellent for his or her direction. Its conceptual procedure is helping scholars extra simply comprehend the thoughts and interpret SPSS and study effects. Key recommendations are easily said and sometimes reintroduced and on the topic of each other for reinforcement. a number of examples exhibit their relevance. This version positive aspects extra rationalization to extend realizing of the innovations. basically an important equations are included.

In addition to updating all through, the recent variation features:

  • New co-author, Debbie L. Hahs-Vaughn, the 2007 recipient of the collage of imperative Florida's collage of schooling Excellence in Graduate instructing Award.
  • A new bankruptcy on logistic regression versions for cutting-edge extra complicated methodologies.
  • More on computing self belief periods and undertaking energy analyses utilizing G*Power.
  • Many extra SPSS screenshots to help with figuring out the right way to navigate SPSS and annotated SPSS output to aid within the interpretation of results.
  • Extended sections on the right way to write-up statistical leads to APA format.
  • New studying instruments together with chapter-opening vignettes, outlines, and an inventory of key thoughts, many extra examples, tables, and figures, bins, and bankruptcy summaries.
  • More tables of assumptions and the results in their violation together with how you can try out them in SPSS.
  • 33% new conceptual, computational, and all new interpretative problems.
  • A web site that includes PowerPoint slides, solutions to the even-numbered difficulties, and attempt goods for teachers, and for college kids the bankruptcy outlines, key ideas, and datasets that may be utilized in SPSS and different programs, and more.

Each bankruptcy starts with an overview, a listing of key thoughts, and a vignette relating to these techniques. reasonable examples from schooling and the behavioral sciences illustrate these techniques. every one instance examines the systems and assumptions and offers directions for a way to run SPSS, together with annotated output, and find out how to enhance an APA kind write-up. precious tables of assumptions and the consequences in their violation are integrated, in addition to the way to try assumptions in SPSS. 'Stop and imagine' bins supply valuable tips for greater knowing the thoughts. each one bankruptcy comprises computational, conceptual, and interpretive difficulties. the information units utilized in the examples and difficulties are supplied on the internet. solutions to the odd-numbered difficulties are given within the book.

The first 5 chapters evaluate descriptive statistics together with methods of representing info graphically, statistical measures, the conventional distribution, and chance and sampling. the rest of the textual content covers inferential information concerning ability, proportions, variances, and correlations, simple and complicated research of variance and regression types. themes no longer handled in different texts equivalent to powerful equipment, a number of comparability and nonparametric approaches, and complicated ANOVA and a number of and logistic regression types also are reviewed.

Intended for one- or two-semester classes in statistics taught in schooling and/or the behavioral sciences on the graduate and/or complicated undergraduate level, knowledge of statistics isn't a prerequisite. A rudimentary wisdom of algebra is required.

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Extra info for An Introduction to Statistical Concepts

Example text

The zero point of an interval scale, if it exists, is arbitrary and does not reflect the total absence of the property being measured. Here the zero point merely serves as a placeholder. For example, suppose that we gave you the final exam in advanced statistics right now. If you were to be so unlucky as to obtain a score of 0, this score does not imply a total lack of knowledge of statistics. It would merely reflect the fact that your statistics knowledge is not that advanced yet (or perhaps the questions posed on the exam just did not capture those concepts that you do understand).

21 On average, how many hours do you study per week? 22 Which question on this survey is the most interesting to you? The least interesting? For each item, determine the most likely scale of measurement (nominal, ordinal, interval, or ratio) and the type of variable [categorical or numerical (if numerical, discrete or continuous)]. Create scenarios in which one or more of the variables in this survey would be a constant, given the delimitations that you define for your study. 10). 10 as “zero”).

Percentile ranks are percentages, as they are continuous values and can take on any value from 0 to 100. 6750. For notational purposes, a percentile rank will be known as PR(Pi), where Pi is the particular score 32 An Introduction to Statistical Concepts whose percentile rank, PR, you wish to determine. 6750. In other words, about 43% of the distribution falls below the score of 400. Let us now consider how percentile ranks are computed. 2) where PR(Pi) indicates that we are looking for the percentile rank PR of the score Pi cf is the cumulative frequency up to but not including the interval containing PR(Pi) (again known as cf below) f is the frequency of the interval containing PR(Pi) LRL is the lower real limit of the interval containing PR(Pi) w is the interval width n is the sample size, and finally we multiply by 100% to place the percentile rank on a scale from 0 to 100 (and also to remind us that the percentile rank is a percentage) As an example, consider computing the percentile rank for the score of 17.

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An Introduction to Statistical Concepts by Debbie L. Hahs-Vaughn, Richard G. Lomax


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