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Text Elements
Discrete
Continuous
Take on fixed number of values w/ gaps between Ex: Shoe size, AP score
You can have an 8 or an 8.5 shoe size, but you cannot have an 8.38
DISPLAYS
Histogram
X values
Probability
Can take on any value within an interval of values
Infinite number inbetween this and that. EX: Money ( YOU PRETEND LIKE IT IS CONTINUOUS ) , height, time.
probability
x values
Uniform
if x axis goes from 0 to k then height is
1/k
k
Normal
N(x,SD)
Prob = Area
- For normal, use z - score & table A
Mean = Expected Value
=
X
i
P
i
Standard Deviation
Pi(X - X)
2
n
i