Statistics: Chapter 6 - Statistical Distributions Flashcards
1
Q
What is a random variable?
A
Values that are outcomes (e.g. X, Y, Z).
2
Q
What types of random variables are there?
A
-Discrete (finite number of variables).
-Continuous (infinite number of variables).
3
Q
What are the ways in which probability distribution can be shown?
A
-Table.
-Probability mass function.
4
Q
Example of a table (probability distribution):
A
5
Q
Example of a probability mass function (probability distribution):
A
6
Q
How would you calculate P (X = r) on the calculator?
A
Binomial PD.
Menu -> 7 -> 4 -> 2.
7
Q
How would you calculate P (X ≤ r) on the calculator?
A
Binomial CD.
Menu -> 7 -> Down -> 1 -> 2.
8
Q
P (X ≤ 5) =
A
P (X ≤ 5).
9
Q
P (X < 5) =
A
P (X ≤ 4).
10
Q
P (X ≥ 5) =
A
1 - P (X ≤ 4).
11
Q
P (X > 5) =
A
1 - P (X ≤ 5).
