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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
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Answers
1
If I want to find the probability of getting at most 2 cars, what X's would I use?
0, 1
0, 1, 2
3, 4, 5, ...
2, 3, 4, ...
2
Is the following variable discrete or continuous? The time it takes you to answer this question
Discrete
Continuous
3
Is the following variable discrete or continuous? Amount of gasoline needed to go to the beach
Continuous
Discrete
4
What are the requirement for a probability distribution?
numbers must sum to 1
All numbers must be between 0 and 1
All numbers must be the same.
numbers can be negative
5
Which is a binomial experiment?
Rolling a dice, record the number of dots.
Picking a card, record the suit.
Flipping a coin, record the number of heads.
Pick 5 students, record the color of their hair.
6
If I want to find the probability of getting exactly 2 cars, what X's are included?
0, 1, 2
2, 3, 4, 5, n
2
Not 2
7
Expected value is the same as the
None of the above
Varience
Mean
Standard Deviation
8
Is the following variable discrete or continuous? The cost a your last Starbucks purchase
Discrete
Continuous
9
If you want to find the binomial probability of getting at most 3 use
1-binomcdf(n,p,2)
1-binomcdf(n,p,3)
binomcdf(n,p,3)
binompdf(n,p,3)
10
Which is a binomial experiment?
Choose a person and ask their favorite food.
Record the weight of babies.
Picking a card, record whether the card was red.
Rolling a dice, record if the dots are odd.
11
If you want to find the binomial probability of getting at least 3 use
binomcdf(n,p,4,n)
1-binomcdf(n,p,3,n)
binompdf(n,p,3)
binomcdf(n,p,3,n)
12
If you are finding a binomial probability of exactly equal use
binomcdf
binompdf
13
If I want to find the probability of getting at least 2 cars, what X's would I use?
3, 4, 5, ..., n
2, 3, 4, 5,..., n
2
0, 1, 2
14
If you want to find the binomial probability of getting more than 3 use
binomcdf(n,p,3, n)
binomcdf(n,p,4, n)
1-binomcdf(n,p,2)
binompdf(n,p,3)
15
Solve: if you make you first success at or before your 3rd attempt
binomcdf(n,p,3)
geometpdf(p,3)
geometcdf(p,4,100)
geometcdf(p,1,3)
16
Is this a binomial experiment? The probability of choosing 2 boys from any class in school.
binomial
not binomial
17
Given a random variable X between 0 and 3, if P(0) = .15, P(1) = .2, P(2)= .3, P(3) =?
.35
.25
.65
.45
18
Solve: if you make you first success on the 5th trial.
geometpdf(p,5)
geomcdf(p,5,100)
poissonpdf(n,5)
binompdf(n,p,5)
