Lucy: Some Business Population Database In TeachingSampling: Selection of Samples and Parameter Estimation in Finite Population

Description

This data set corresponds to a random sample of BigLucy. It contains some financial variables of 2396 industrial companies of a city in a particular fiscal year.

Usage

 1 data(Lucy)

Format

ID

The identifier of the company. It correspond to an alphanumeric sequence (two letters and three digits)

Ubication

The address of the principal office of the company in the city

Level

The industrial companies are discrimitnated according to the Taxes declared. There are small, medium and big companies

Zone

The city is divided by geoghrafical zones. A company is classified in a particular zone according to its address

Income

The total ammount of a company's earnings (or profit) in the previuos fiscal year. It is calculated by taking revenues and adjusting for the cost of doing business

Employees

The total number of persons working for the company in the previuos fiscal year

Taxes

The total ammount of a company's income Tax

SPAM

Indicates if the company uses the Internet and WEBmail options in order to make self-propaganda.

Author(s)

Hugo Andres Gutierrez Rojas hagutierrezro@gmail.com

References

Gutierrez, H. A. (2009), Estrategias de muestreo: Diseno de encuestas y estimacion de parametros. Editorial Universidad Santo Tomas.

Examples

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 data(Lucy) attach(Lucy) # The variables of interest are: Income, Employees and Taxes # This information is stored in a data frame called estima estima <- data.frame(Income, Employees, Taxes) # The population totals colSums(estima) # Some parameters of interest table(SPAM,Level) xtabs(Income ~ Level+SPAM) # Correlations among characteristics of interest cor(estima) # Some useful histograms hist(Income) hist(Taxes) hist(Employees) # Some useful plots boxplot(Income ~ Level) barplot(table(Level)) pie(table(SPAM))

Example output

Income Employees     Taxes
1035217.0  151950.0   28653.5
Level
SPAM  Big Medium Small
no   26    291   620
yes  57    446   956
SPAM
Level        no    yes
Big     31914  71792
Medium 190852 296499
Small  175186 268974
Income Employees     Taxes
Income    1.0000000  0.645536 0.9169541
Employees 0.6455360  1.000000 0.6468550
Taxes     0.9169541  0.646855 1.0000000

TeachingSampling documentation built on April 22, 2020, 1:05 a.m.