中山大学管理学院商务统计CH1.ppt

Business Statistics: A First Course, 5e ? 2009 Prentice-Hall, Inc. Business Statistics: A First Course, 5e ? 2009 Prentice-Hall, Inc. Chap 1-* Chapter 1Introduction and Data Collection Business Statistics: A First CourseFifth Edition Chap 1-* Why Learn Statistics? “Stocks May Fall, But Execes’ Pay Doesn’t: In 2007, the median compensation for the CEOs of the 50 largest corporations in the SP 500 was $15.7 million” “Americans Gulping More Bottled Water: The annual per capita consumption of bottled water has increased from 18.8 gallons in 2001 to 28.3 gallons in 2006” “…… credit cards increased from 18% in 1995 to 25% in 2005……” Chap 1-* Why Learn Statistics? People use numbers every day to describe or analyze the world we live in. You will make better sense of the numbers in the stories behind these headlines if you understand statistics Chap 1-* Why Learn Statistics? Statistics is the branch of mathematics that transforms numbers into useful information for decision makers Statistics provides a way of understanding and then reducing, BUT NOT eliminating, the variation that is part of any decision-making process Can tell you the known risks associated with making a decision Chap 1-* Why Learn Statistics? Statistics does this by providing a set of methods: Help you to find patterns in “the numbers” Enable you to determine whether differences in “the numbers” are just due to chance Learn the appropriate conditions for using those methods Chap 1-* Why Study Statistics? Why business school students need to study statistics? Chap 1-* Why Study Statistics? Decision Makers Use Statistics To: Present and describe business data and information properly Draw conclusions about large groups of individuals or items, using information collected from subsets of the individuals or items. Make reliable forecasts about a business activity Improve business processes Chap 1-* Why Learn Statistics? So you are able to make better sense of the ubiquitous use of numbers: Busin