tailieunhanh - Ebook Understandable statistics concepts and methods (10th edition): Part 2

(Bq) Part 2 book "Understandable statistics concepts and methods" has contents: Hypothesis testing, correlation and regression, chi square and F distributions, nonparametric statistics. | 8 Mary Evans Picture Library/Arthur Rackham/ The Image Works Introduction to Statistical Tests Testing the Mean m Testing a Proportion p Tests Involving Paired Differences (Dependent Samples) Testing m1 Ϫ m2 and p1 Ϫ p2 (Independent Samples) Sam Abell/National Geographic/Getty Images “Would you tell me, please, which way I ought to go from here?” “That depends a good deal on where you want to get to,” said the Cat. Charles Lutwidge Dodgson (1832–1898) was an English mathematician who loved to write children’s stories in his free time. The dialogue between Alice and the Cheshire Cat occurs in the masterpiece Alice’s Adventures in Wonderland, written by Dodgson under the pen name Lewis Carroll. These lines relate to our study of hypothesis testing. Statistical tests cannot answer all of life’s questions. They cannot always tell us “where to go,” but after this decision is made on other grounds, they can help us find the best way to get there. “I don’t much care where—” said Alice. “Then it doesn’t matter which way you go,” said the Cat. —LEWIS CARROLL Alice’s Adventures in Wonderland For online student resources, visit the Brase/Brase, Understandable Statistics, 10th edition web site at . 408 Copyright 2010 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. Hypothesis Testing Many of life’s questions require a yes or no answer. When you must act on incomplete (sample) information, how do you decide whether to accept or reject a proposal? (SECTION ) What is the P-value of a statistical test? What does this .