Coastal Star Sales Corporation is a West Coast wholesaler that markets leisure products from several manufacturers. Coastal Star has an 80-person sales force that sells to wholesalers in a six-state area, which is divided into two sales regions. The chart below show the names of a sample of eleven salespeople, some descriptive information about each person, and sales performance for each of the last two years.
Questions:
1. Calculate a mean and a standard deviation for each variable.
2. Set a 95 percent confidence interval around the mean for each variable.
3. Calculate the median, mode, and range of each variable.
4. Organize the data for current sales into a frequency distribution with three classes: (a) under $500,000, (b) $500,000 to $999,999, and (c) $1,000,000 and over.
5. Organize the data for years of selling experience into a frequency distribution with two classes: (a) less than five years and (b) five or more years.
| Sales |
| Region |
Salesperson |
Age |
Years of
Experience |
Previous
Year |
Current
Year |
| Northern |
Jackson |
40 |
7 |
$412,744 |
$411,007 |
| Northern |
Gentry |
60 |
12 |
$1,491,024 |
$1,726,630 |
| Northern |
La Forge |
26 |
2 |
$301,421 |
$700,112 |
| Northern |
Miller |
39 |
1 |
$401,241 |
$471,001 |
| Northern |
Mowen |
64 |
5 |
$448,160 |
$449,261 |
| Southern |
Young |
51 |
2 |
$518,897 |
$519,412 |
| Southern |
Fisk |
34 |
1 |
$846,222 |
$713,333 |
| Southern |
Kincaid |
62 |
10 |
$1,527,124 |
$2,009,041 |
| Southern |
Krieger |
42 |
3 |
$921,174 |
$1,030,000 |
| Southern |
Manzer |
64 |
5 |
$463,399 |
$422,798 |
| Southern |
Weiner |
27 |
2 |
$548,011 |
$422,001 |
| Source: Cengage Learning 2013. |
Source: Cengage Learn 2013.