exam1-review-ss

# exam1-review-ss - The UNIVERSITY of NORTH CAROLINA at...

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5/23/11 Midterm Exam 1 Review 1 STOR 155 Introductory Statistics Midterm Exam 1 Review The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL

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5/23/11 Midterm Exam 1 Review 2 Midterm Exam 1 • Tue. 5/24 in class • About 35 multiple choice problems • Get a couple of Scantron sheets (Students stores ) • #2 pencil • Calculator • Closed-book, closed-notes
5/23/11 Midterm Exam 1 Review 3 What is Statistics for • Statistics: the science of collecting, organizing, and interpreting data. Data collection. Data analysis - organize & summarize data to bring out main features and clarify their underlying structure. Inference and decision theory – extract the info provided by the data and may be used as a guide for further action.

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5/23/11 Midterm Exam 1 Review 4 Fundamental concepts: • Population: the entire group of individuals that we want information about. • Sample: a part of the population that we actually examine in order to gather information. • Sample size: number of observations/individuals in a sample. • Statistical inference: to make an inference about a population based on the information contained in a sample.
5/23/11 Midterm Exam 1 Review

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exam1-review-ss - The UNIVERSITY of NORTH CAROLINA at...

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