郑州大学：《计量经济学》课程教学资源（PPT课件讲稿）Chapter 02 Statistical description of quantitative variable

Chapter-2 Statistical description of quantitative variable

Chapter-2 Statistical description of quantitative variable

Teaching contents In this section, we shall study descriptive techniques of quantitative variable a Section i frequency distribution table and frequency distribution graph w Section 2 Measures of central tenden Section 3 Measures of dispersion tendency

Teaching contents In this section, we shall study descriptive techniques of quantitative variable. Section 1 Frequency distribution table and frequency distribution graph Section 2 Measures of central tendency Section 3 Measures of dispersion tendency

Teaching aims e To learn the usage of frequency table and graph o To master the application of different indexes

Teaching aims To learn the usage of frequency table and graph. To master the application of different indexes

i Section 1 Frequency distribution table i and frequency distribution graph Department of Health Statistics

Department of Health Statistics Section 1 Frequency distribution table and frequency distribution graph

s part I Frequency distribution table and graph of qualitative variable s part 2 Frequency distribution table and graph of quantitative variable s part 3 Usage of frequency distribution graph NEXT Department of Health Statistics

part 1 Frequency distribution table and graph of qualitative variable part 2 Frequency distribution table and graph of quantitative variable part 3 Usage of frequency distribution graph Department of Health Statistics NEXT

[EXample I. university officials periodically review the distribution of undergraduate majors to help determine a fair allocation of resources and the following data were obtained Table 1. 1 the distribution of undergraduate majors college Number of ma iors agriculture 1500 Arts and sciences 3200 education 1200 Engineering 4100 Department of Health Statistics

[Example 1.1] university officials periodically review the distribution of undergraduate majors to help determine a fair allocation of resources , and the following data were obtained college Number of majors agriculture 1500 Arts and sciences 3200 education 1200 Engineering 4100 Department of Health Statistics Table 1.1 the distribution of undergraduate majors

number of ma jors 5000 4000 3000 2000 engineering arts and agriculture education sciences Fig 1. 1 the distribution of undergraduate majors Department of Health Statistics

Department of Health Statistics Fig 1.1 the distribution of undergraduate majors back number of majors 0 1000 2000 3000 4000 5000 engineering arts and sciences agriculture education

TExample I. 2 ]The techniques will be illustrated using the scottish heart health study but for simplicity we shall now take only one variable recorded on 50 subjects. Department of Health Statistics

[Example 1.２] The techniques will be illustrated using the Scottish Heart Health Study, but for simplicity we shall now take only one variable recorded on 50 subjects. Department of Health Statistics

Table 1.2 Serum total cholesterol(mmol/L) of 50 subjects from the Scottish Heart Health Study 5.75 6.29 6.13 6.76 5.98 25 6.31 99 6.47 5.71 5.19 4.35 5.35 7.11 6.05 7.01 5.86 5.42 4.92 7.12 5.85 5.64 6.23 5.71 6.74 6.36 5.75 7.71 6.19 7.55 6.76 7.14 5.73 6.73 7.86 5.51 6.02 6.54 5.34 6.92 15 6.55 7.16 4.79 6.64 Department of Health Statistics

Department of Health Statistics 5.75 6.29 6.13 6.78 6.46 6.76 5.98 6.25 6.31 5.99 6.47 5.71 5.19 4.35 5.35 7.11 6.89 6.05 7.01 5.86 5.42 4.92 7.12 5.85 5.64 7.04 6.23 5.71 6.74 6.36 5.75 7.71 6.19 7.55 6.76 7.14 5.73 6.73 7.86 5.51 6.02 6.54 5.34 6.92 7.15 6.55 7.16 4.79 6.64 6.83 Table 1.2 Serum total cholesterol (mmol/L) of 50 subjects from the Scottish Heart Health Study

How to describe the data in table .2? Y List all the data one by one, but it is difficult for the reader to learn the distribution character of 50 individuals Y Summarize it using specific index, which is economical in space and easier for the reader to understand Department of Health Statistics

How to describe the data in table 1.2? ✓ List all the data one by one, but it is difficult for the reader to learn the distribution character of 50 individuals. ✓ Summarize it using specific index, which is economical in space and easier for the reader to understand. Department of Health Statistics