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