10_week_1_session_1_summ08 - 1 Statistics 10 Professor...

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Statistics 10 Professor Esfandiari Summer 2008 Supplemental Handouts Weeks 1- lecture 1 The objectives of the supplemental handouts posted on the Moodle is not to discuss or summarize the content covered in the book. The book is the main resource that you are expected to use for learning the concepts and methods discussed . The objective of the handouts is to: 1) provide you with a clear picture of the concepts and methods that we plan to discuss each week, and 2) complement the book by introducing you to how statistics is used in the real world. This will be done through: 1) Presenting you with a summary of the major concepts discussed in lecture, 2) Introducing you to some of the case studies that I have conducted as a statistical/educational consultant have you think about the major concepts discussed in the course by answering questions about the case studies discussed, and 3) Helping you develop a good sense about how statistics is used to answer real world questions. The objective of this lecture is to show you: State the problem and/or question that you want to answer clearly. Identify the variables involved in a research question and determine how to measure and classify them as categorical, ordinal, or quantitative. Identify the cases (subjects) about whom you are going to collect the data. Determine how you are going to plot the data (pie charts, bar charts, contingency tables, segmented bar charts, histograms, boxplots, and side-by-side boxplots). Calculate, interpret and understand cell, column and row percentages, conditional and marginal distributions in a contingency table, and examine the relationship between categorical variables. Interpret the relationship between two categorical variables through a segmented bar chart Understand, calculate, and interpret the concept of percentile, and cumulative percentile. Sampson paradox An example from my own research: The objective of a study that I conducted in one of the local high schools was to evaluate the effect of a “life skills” program on helping the ninth grade students adjust to high school. The life skills class involved teaching the students skills such as communication , 1
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conflict resolution, group work, goal setting, goal getting, peer relations, and relation with adults at the school. A total of 498 ninth grade students participated in the study and the class was taught for a whole academic year. A total of eight teachers and counselors taught the class and there were 24 classes. The students were from different ethnic backgrounds. Some of the teachers who taught the life skills class participated in planning the class and some did not. The questions that we were trying to answer included: Did participation if the life skills class help the students feel more safe at school?
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10_week_1_session_1_summ08 - 1 Statistics 10 Professor...

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