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AP Stat- Unit 4: Probability Flashcards | StudBud
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AP Stat- Unit 4: Probability
AP Stat- Unit 4: Probability
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StudBud Administration
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Probability vocabulary
Flashcards
17 cards
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Questions
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Answers
1
What is the purpose of drawing a Venn diagram for probability?
Because Ms. Lusby told me to
To illustrate mutually exclusive events
To illustrate Sample Space, union, and intersection
To only illustrate dependent events
2
The probability that an event occurs given that another event has already occurred
Conditional Probability
Independent Events
Probability model
Probability distribution
3
Can events be both mutually exclusive and independent?
Yes
What is an event?
Maybe
No
4
How do you find the standard deviation of a random variable? (√variance)
σx = σx2 + σy2 +2pσxσy
σx= √∑(xi - µx)2pi
σx = ∑xipi
σx = ∑(xipi)2 / xi
5
What are the two critical parts of a probability model?
1. Sample space; 2. Two-Way Table
1. The start; 2. The end
1. Title/Label; 2. Scale
1. Sample Space; 2. The probability of each outcome
6
Define: Discrete Random Variable
a random variable that takes on countable values
a random variable that takes on all values in an interval
a random variable who conducts business on the down low
a random number between 0 and 1
7
What type of diagram do we use to represent discrete random variables?
Normal Distribution Curves
Probability distribution
Bar Graphs
Density curves
8
P(A∪B) = P(A) + P(B) - P(A∩B) This is...
General Addition Rule for mutually exclusive events
A formula of no significance
General Multiplication rule
General Addition Rule
9
As the number of trials increase, the proportion of outcomes approaches theoretical probability
The law of Predictability
The law of repetition
The first law of Thermodynamics
The law of large numbers
10
Define: Mutually exclusive(disjointed) events
Two events that depend on each other
Two events that aren't real
Two events that always occur together
Two events have no outcomes in common
11
How do you find the mean of a discrete random variable? (Expected Value)
µx = ∑(xipi) / xi
µx = ∑xipi
µx = µx = ∑(xipi)2 / xi
µx = σx2 + σy2 +2pσxσy
12
What type of diagram do we use to represent continuous random variables?
Density Curves
Probability Histograms
Two-way Tables
Normal Distribution Curves
13
Define: Continuous Random Variable
Title, Label, Scale
a random variable that takes on all values in an interval
a random variable that has countable values
Independent events
14
Which of these ways is a correct way to check if two events are independent?
P(A|B) = P(A)
P(A|B) = P(A∩B)/ P(B)
P(B|A) = P(B)P(A)
P(A∩B) = P(A) P(B)
15
Define: Probability
The mathematics of Love
The mathematics of graphing
The mathematics of change
The mathematics of chance
16
The complement of A is...
P(A) - 1
1 + P(A)
1 - P(A)
B
17
This is an example of what type of diagram?
Tree Diagram
Normal Distribution Curve
Two-Way Table
Stem and Leaf Plot
