Unformatted text preview: Business Statistics ? ? ? ? ? ? : A321 Emial : [email protected] Slide 1 考考考考
s 考考考 15%
考考考 50% Slide 2 Chapter 1 Data and Statistics Slide 3 Major Contents
s Applications in Business and Economics
Statistical Inference Slide 4 Applications in Business and Economics
s s s Accounting
Public accounting firms use statistical sampling procedures when conducting audits for their clients.
Financial analysts use a variety of statistical information, including priceearnings ratios and dividend yields, to guide their investment recommendations.
Electronic pointofsale scanners at retail checkout counters are being used to collect data for a variety of marketing research applications. Slide 5 Applications in Business and Economics
s s Production
A variety of statistical quality control charts are used to monitor the output of a production process.
Economists use statistical information in making forecasts about the future of the economy or some aspect of it. Slide 6 Data
s Elements, Variables, and Observations
Scales of Measurement
Qualitative and Quantitative Data
CrossSectional and Time Series Data Slide 7 Data and Data Sets
s s Data are the facts and figures that are collected, summarized, analyzed, and interpreted.
The data collected in a particular study are referred to as the data set. Slide 8 Elements, Variables, and Observations
s s The elements are the entities on which data are collected.
A variable is a characteristic of interest for the elements.
The set of measurements collected for a particular element is called an observation.
The total number of data values in a data set is the number of elements multiplied by the number of variables. Slide 9 Data, Data Sets, Elements, Variables, and Observations
Variables Stock Annual Earn/
Company Exchange Sales($M) Sh.($)
Elements AMEX 73.10 0.86 OTC
74.00 1.67 NYSE 365.70 0.86 NYSE 111.40 0.33
AMEX 17.60 0.13
Data Set Datum Slide 10 Scales of Measurement
s s s Scales of measurement include:
The scale determines the amount of in...
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