什么是统计.ppt

什么是统计
第1页，本讲稿共101页
STATISTICS
教师
贺富强
联系方式
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统计学
Author: He Fuqiaof $54000 and 94 percent were employed within three months of graduation.
The USA drinks more coffee than any other country, an average of cups per person per day.
The GEC reported revenues of $111,630,000 in 1999, up from $100,469,000 in 1998. The 1999 year end closing price for a share of common stock was $, up from $ at the end of 1998.
Author: He Fuqiang
第15页，本讲稿共101页
根据中国水泥网的数据，，合1个中国人1年消耗1吨水泥。，产能过剩将近5亿吨，产能利用率不足75％。 而且，初步统计2009年在建项目的水泥产能是6亿吨。2009年1~7月份全国水泥制造业完成固定资产投资792亿元，%。据了解，从2008年到2009年8月，全国水泥投资的月度同比增速始终保持在40%以上。 %。也就是说，产能超过需求可能达到10亿吨的数量级。
Author: He Fuqiang
第16页，本讲稿共101页
Data in Management
1. Financial statement
2. Security prices and volumes and interest rates
3. Sales reports
4. Market survey results
5. Money supply figures
quality measures
Author: He Fuqiang
第17页，本讲稿共101页
Why Study Statistics?
There are at least three reasons for studying statistics
1. Data is everywhere
2. Statistical techniques are used to make many decisions that affect our lives
3. No matter what your future line of work, you will make decisions that involves data.
An understanding of statistical methods will help you make these decisions more effectively
Author: He Fuqiang
第19页，本讲稿共101页
Understanding of Data and Decision
Determine whether the existing information is adequate or additional information is required.
Gathering additional information, if it is needed.
Summarize the information in a useful and informative manner.
Analyze the available information.
Draw conclusions and make inferences while assessing the risk of an incorrect conclusion.
Author: He Fuqiang
第20页，本讲稿共101页
Types of Statistics
1、Descriptive statistics
a branch of the discipline that is concerned with developing and utilizing techniques for the effective pres