Scrapper Elevator Company has 20 sales representatives who s

Scrapper Elevator Company has 20 sales representatives who sell its product throughout
the United States and Canada. The number of units sold last month by each representative
is listed below. Assume these sales figures to be the population values.

2 3 2 3 3 4 2 4 3 2 2 7 3 4 5 3 3 3 3 5

b. Compute the mean of the population.
c. Select five random samples of 5 each. Compute the mean of each sample. Use the
methods described in this chapter and
d. Compare the mean of the sampling distribution of the sample mean to the population
mean. Would you expect the two values to be about the same?

Solution

a. Stem-and-leaf of C1 N = 20
Leaf Unit = 0.10


5 2 00000
(9) 3 000000000
6 4 000
3 5 00
1 6
1 7 0

b. Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum
C1 20 0 3.300 0.282 1.261 2.000 2.250 3.000 4.000 7.000