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