Use the accompanying list of eight names to complete parts​ (a) through​ (e) below.
(3,6), (5,7), (4,7), (7,15), (3,8), (7,9), (9,5), (4,11)
​(a) Make a scatter diagram for the relation between the number of letters in each​ person's first and last name. Choose the correct graph below.
​(b) Figure the correlation coefficient for the relation between the number of letters in each​ person's first and last name. ​(Round to two decimal places as​ needed.)
Determine the test statistic. Select the correct choice below​ and, if​ necessary, fill in the answer box within your choice. ​(Round to two decimal places as​ needed.)