More practice:The five number summary with outlier test with a set with positive and negative values

This data set is the scoring differences in the Western Conference of the NBA as of Friday, 24 January.

7.9 7.3 5.8 5.4 5.0 4.2 4.0 3.2 1.3 0.4 -0.7 -2.2 -2.4 -5.2 -6.7

Answers are in the comments.