Assignment:
Importance of Graphing. Exercises provide two data sets from "Graphs in Statistical Analysis," by F. J. Anscombe, The American Statistician, Vol. 27. For each exercise,
a. Construct a scatterplot.
b. Find the value of the linear correlation coefficient r, then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables.
c. Identify the feature of the data that would be missed if part (b) was completed without constructing the scatterplot.
Exercise
|
X
|
10
|
8
|
13
|
9
|
11
|
14
|
6
|
4
|
12
|
7
|
5
|
|
y
|
9.14
|
8.14
|
8.74
|
8.77
|
9.26
|
8.10
|
6.13
|
3.10
|
9.13
|
7.26
|
4.74
|
Exercise
|
X
|
10
|
8
|
13
|
9
|
11
|
14
|
6
|
4
|
12
|
7
|
5
|
|
y
|
7.46
|
6.77
|
12.74
|
7.11
|
7.81
|
8.84
|
6.08
|
5.39
|
8.15
|
6.42
|
5.73
|