1. 2013-04-14 [2] [R-sig-teaching] create a negative skewed plot (densi r-sig-tea R. Michael We 2. 2013-04-14 [2] [R-sig-teaching] Create and graph a negative skewed d r-sig-tea Dennis Murphy 3. 2013-04-12 [1] [R-sig-teaching] wielbili r-sig-tea Ali Zanaty