2.3.1 Percentiles and Median Flashcards
(5 cards)
1
Q
how is pth percentile denoted?
A
π_p where p is in [0,1]
2
Q
what is the smallest value of π_p for a discrete r.v.?
A
F(π_p) ≥ p.
3
Q
what is the smallest value of π_p for a continuous r.v.?
A
F(π_p) = p.
4
Q
What is a percentile, conceptually?
A
A percentile tells you the value below which a certain percentage of data falls.
For example, if the 50th percentile of a random variable is 14, this means that 50% of the time, the random variable is less than or equal to 14
5
Q
how do you calc the interquartile range?
A
π_.75 -π_.25
