MATH 130: Worksheet 4 February 4th, 2010 Name:
Show all work. Please answer neatly on an attached paper. Unsupported answers may
receive no credit.
1. (4 points) Do creative people make better salespeople? Ten sales staff in a large company
were given a creativity test (scores range from 0 to 20, with higher scores indicating
greater creativity) and were evaluated regarding sales growth performance (a score of
100 indicates an average performance, and larger scores indicate better performance).
The creativity scores and sales growth performance scores are given below.
Creativity Score Sales Growth
9 93
7 89
8 95
13 101
10 102
10 96
9 95
18 111
10 103
14 107
We want to investigate if creative people tend to perform better with regard to sales
growth.
(a) Draw a scatterplot of the data. (Make sure to label the axis appropriately.)
(b) Describe the form, direction, and strength of the relationship.
(c) Find the correlation r between creativity score and sales growth.
(d) What does this suggest about the association between creativity score and sales
growth?
