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The following tables provide information about the top women-owned businesses in the U.

The following tables provide information about the top women-owned businesses in the U.S. The first table gives year 2000 revenue in millions of dollars and number of employees for Pennsylvania women-owned companies with year 2000 revenues of $70 million or higher. The second table gibes the same information for Michigan women-owned companies with year 2000 revenues of $70 million or higher.
Pennsylvania company 2000 revenue ($ million) number of employees
84 lumber                 2000                          4400
Charming shoppes       1600                    12000
Rodale                500                             1300
Mothers work      366.3                    3800
Harmelin media       200                             105
Wetherill associates    135                             500
Hanna holdings       73.7                    1284
Michigan companies       2000 revenue ($million)      number of employees
Ilitch holdings 800                        700
Plastech engineer          420                        3500
Jerome-duncan ford         350                        300
Elder ford                 287.6                      108
Patsy Lou                  221                        240
Mexican ind                174                        1463
Rush trucking              153                        2000
jaguar-saab                143                        134
manpower metro             118                        250
continental plastic        107                        650
Leco                       82                         800
Rodgers Chevrolet          75                         80
strategic staffing         75                         600
two men & a truck          75                         40
Systrand Manu              72                         230
question a. use a calculator or computer to compute the mean and standard deviation of the year 2000 revenue for the Pennsylvania companies in the first table.
question b. use a calculation or computer to compute the mean and standard deviation of the year 2000 revenue for the Michigan companies in the second table.
question c. explain what the values you calculatwd in parts a and b of this exploration tell you about the data sets.
question d. how would the mean and standard deviation change if the largest data value in each set were removed?
question e. find the mean and the standard deviation of the number of employees for the Pennsylvania companies in the first table.
question f. find the mean and the standard deviation of the number of employees for the Michigan companies in the second table and compare to your results in part e of the exploration.

This question was asked on Apr 28, 2010.

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