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Probability Distribution Flashcards | StudBud
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Probability Distribution
Probability Distribution
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Statistics Probability Distributions
Flashcards
18 cards
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Questions
18
Answers
1
What are the requirement for a probability distribution?
All numbers must be between 0 and 1
numbers can be negative
All numbers must be the same.
numbers must sum to 1
2
Solve: if you make you first success at or before your 3rd attempt
binomcdf(n,p,3)
geometcdf(p,3)
geometpdf(p,3)
3
If you are finding a binomial probability of exactly equal use
binompdf
binomcdf
4
Which is a binomial experiment?
Picking a card
Rolling a dice
Flipping a coin
5
Solve: if you make you first success on the 5th trial.
poissonpdf(n,5)
geometpdf(p,5)
binompdf(n,p,5)
6
If you want to find the binomial probability of getting at least 3 use
binomcdf(n,p,3)
1-binomcdf(n,p,2)
1-binomcdf(n,p,3)
binompdf(n,p,3)
7
Given a random variable X between 0 and 3, if P(0) = .15, P(1) = .2, P(2)= .3, P(3) =?
.45
.65
.25
.35
8
If I want to find the probability of getting at most 2 cars, what formula would I use?
P(x>2)
P(x≤2)
P(x≥2)
P(x<2)
9
If you want to find the binomial probability of getting at most 3 use
binompdf(n,p,3)
1-binomcdf(n,p,2)
binomcdf(n,p,3)
1-binomcdf(n,p,3)
10
Is the following variable discrete or continuous? The time it takes you to answer this question
Continuous
Discrete
11
Is the following variable discrete or continuous? Amount of gasoline needed to go to the beach
Continuous
Discrete
12
If I want to find the probability of getting exactly 2 cars, what formula do I use?
P(x = 2)
P(x < 2)
P(x > 2)
13
If you want to find the binomial probability of getting more than 3 use
1-binomcdf(n,p,3)
binompdf(n,p,3)
1-binomcdf(n,p,2)
binomcdf(n,p,3)
14
Which is needed to use a Poisson distribution?
a given time interval
probability
reference to the first occurrance
number of trials
15
Is the following variable discrete or continuous? The cost a your last Starbucks purchase
Discrete
Continuous
16
Expected value is the same as the
None of the above
Standard Deviation
Varience
Mean
17
Is the following a binomial experiment? Count the number of boys and girls in various classes.
not binomial
binomial
18
If I want to find the probability of getting at least 2 cars, what formula would I use?
P(x<2)
P(x>2)
P(x≥2)
P(x=2)
