Coefficient of determination and correlation.
Mary Sue wants to know if there is a connection between attendance at craft fairs and the number of exhibitors who have booths at the fair. For a casual sample of seven local craft fairs, she chose a random day of the fair and recorded the number of exhibitors. In data below, x represents the number of exhibitors and y represents the attendance in hundreds of people.
|
x
|
35
|
55
|
75
|
95
|
100
|
135
|
150
|
|
y
|
1.2
|
2.1
|
4.2
|
5.4
|
5.8
|
6.2
|
9.5
|
What does the coefficient of purpose tell you about variation in attendance and the variation in the number of exhibitors?