Life sentences do not always mean life in prison without parole. People with 1 life sentence can get out well before their death if they are paroled. By giving 2 consecutive life sentences, the person begins serving the 2nd one as soon as paroled for the first, thereby making it closer to an actual life sentence.
For skewed distributions, it is quite common to have one tail of the distribution considerably longer or drawn out relative to the other tail. A skewed right distribution is one in which the tail is on the right side. A skewed left distribution is one in which the tail is on the left side. The above histogram is for a distribution that is skewed right. Skewed distributions bring a certain philosophical complexity to the very process of estimating a typical value for the distribution.
Meaning the right (as opposed to the left) is from mid-13c.; political use from 1825. From early 14c. as a right action, a good deed.. Meaning a blow with the right fist is from 1898. The phrase to rights at once, straightway is 1660s, from sense in a proper manner (Middle English). Old English rehte, rihte in a straight or direct manner, from (adj.1). Right on! as an exclamation of approval first recorded 1925 in African-American vernacular, popularized mid-1960s by Black Panther movement.