tailieunhanh - Ebook Elementary statistics (10th edition): Part 2

(BQ) Part 1 book "Elementary statistics" has contents: Introduction to statistical inferences, inferences involving one population, inferences involving two populations, applications of chi square, analysis of variance, linear correlation and regression analysis, elements of nonparametric statistics. | CHAPTER 8 Introduction to Statistical Inferences Were They Shorter Back Then? The Nature of Estimation Estimation of Mean ( known) The Nature of Hypothesis Testing Hypothesis Test of Mean ( known): A Probability-Value Approach Hypothesis Test of Mean ( known): A Classical Approach © Christa Renee/Getty Images Were They Shorter Back Then? WERE THEY SHORTER BACK THEN? Throughout the chapter, this icon introduces a list of resources on the StatisticsNow website at that will: The average height for an early 17thcentury English man was approximately 5' 6''. For 17th-century English women, it was about 5' 1/2''. While average heights in England remained virtually unchanged in the 17th and 18th centuries, American • Help you evaluate your knowledge of the material Source: • Allow you to take an exam-prep quiz • Provide a Personalized learning Plan targeting resources that address areas you should study colonists grew taller. Averages for modern Americans are just over 5' 9'' for men, and about 5' 3 3/4'' for women. The main reasons for this difference are improved nutrition, notably increased consumption of meat and milk, and antibiotics. The National Center for Health Statistics (NCHS) provides statistical information that guides actions and policies to improve the health of the American people. Recent data from NCHS give the average height of females in the United States to be inches, with a standard deviation of inches. A random sample of 50 females from the health profession yielded the following height data. [EX08-001] Do you expect the mean of this random sample of 50 .