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F19 after 5.3 Probability Distribution Flashcards | StudBud
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F19 after 5.3 Probability Distribution
F19 after 5.3 Probability Distribution
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Statistics Probability Distributions
Flashcards
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Questions
15
Answers
1
What are the requirement for a probability distribution?
numbers can be negative
All numbers must be the same.
All numbers must be between 0 and 1
numbers must sum to 1
2
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)
3
If you are finding a binomial probability of exactly equal use
binompdf
binomcdf
4
Is the following variable discrete or continuous? The cost a your last Starbucks purchase
Discrete
Continuous
5
Given a random variable X between 0 and 3, if P(0) = .15, P(1) = .2, P(2)= .3, P(3) =?
.35
.25
.45
.65
6
Is the following variable discrete or continuous? The time it takes you to answer this question
Discrete
Continuous
7
Expected value is the same as the
Varience
Standard Deviation
Mean
None of the above
8
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)
9
If you want to find the binomial probability of getting at least 3 use
1-binomcdf(n,p,3)
binomcdf(n,p,3)
1-binomcdf(n,p,2)
binompdf(n,p,3)
10
Which is a binomial experiment?
Picking a card
Flipping a coin
Rolling a dice
11
If you want to find the binomial probability of getting at most 3 use
binomcdf(n,p,3)
binompdf(n,p,3)
1-binomcdf(n,p,3)
1-binomcdf(n,p,2)
12
Is the following a binomial experiment? Count the number of boys and girls in various classes.
not binomial
binomial
13
If you want to find the binomial probability of getting more than 3 use
1-binomcdf(n,p,2)
binomcdf(n,p,3)
binompdf(n,p,3)
1-binomcdf(n,p,3)
14
Is the following variable discrete or continuous? Amount of gasoline needed to go to the beach
Discrete
Continuous
15
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)