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Quiz 2 (MTK3007)_Discrete & continuous Probability Distribution Flashcards | StudBud
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Quiz 2 (MTK3007)_Discrete & continuous Probability Distribution
Quiz 2 (MTK3007)_Discrete & continuous Probability Distribution
20 terms
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StudBud Administration
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Statistics Probability Distributions
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Answers
1
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)
2
If you are finding a binomial probability of exactly equal use
binomcdf
binompdf
3
If you want to find the binomial probability of getting at most 3 use
1-binomcdf(n,p,3)
binompdf(n,p,3)
binomcdf(n,p,3)
1-binomcdf(n,p,2)
4
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,2)
1-binomcdf(n,p,3)
5
Random variables that integers assigned with probability are called
Discrete random variables
Generic random variables
Continuous random variables
6
Expected value is the same as the
Mean
Varience
None of the above
Standard Deviation
7
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)
8
Given a random variable X between 0 and 3, if P(0) = .15, P(1) = .2, P(2)= .3, P(3) =?
.35
.65
.25
.45
9
Is the following variable discrete or continuous? The time it takes you to answer this question
Discrete
Continuous
10
What is the P(1.48 <= Z <= 2.22)?
0.438
0.9306
0.0562
0.562
11
Is the following variable discrete or continuous? The cost of your last Starbucks purchase
Discrete
Continuous
12
Is the following variable discrete or continuous? Amount of gasoline needed to go to the beach
Discrete
Continuous
13
If you want to find the binomial probability of getting more than 3 use
1-binomcdf(n,p,3)
binompdf(n,p,3)
binomcdf(n,p,3)
1-binomcdf(n,p,2)
14
Which is a binomial experiment?
Flipping a coin
Rolling a dice
Picking a card
15
Is the following a binomial experiment? Count the number of boys and girls in various classes.
binomial
not binomial
16
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)
17
What is P(X>7) in a probability distribution where the max random variable value is 10?
1 - P(X=7)
P(X=8) + P(X=9) + P(X=10)
P(X=8) + P(X=9)
phone a friend?
18
The mean of a random variable is called the
expected variable
expected variance
expected discrete
expected value
19
Which is needed to use a Poisson distribution?
probability
a given time interval
number of trials
reference to the first occurrance
20
What are the requirement for a probability distribution?
numbers must sum to 1
All numbers must be the same.
numbers can be negative
All numbers must be between 0 and 1
