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Binomial, Geometric, RV Flashcards | StudBud
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Binomial, Geometric, RV
Binomial, Geometric, RV
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1
If p(a person relaxes by taking a walk) = 0.61, what is p(at least 3 out of 5 people relax by taking a walk)?
1-binomcdf(5, 0.61, 2)
1-binompdf(5, 0.61, 2)
binompdf(5, 0.61, 3)
binomcdf(5, 0.61, 3)
2
A company has 52 employees; the p(an employee is early to work) = 0.17. How many employees are expected to be early?
17
3.46
5.88
8.84
3
What probability does the following calculate: geometcdf(0.65, 2)
the probability of the first success on the 2nd try
the probability of at most 2 successes
the probability of 2 successes
the probability of the first success on the 1st or 2nd try
4
What is the mean of 3Y - X
-31
31
1
-1
5
What is the mean of of X + 3Y?
11
31
- 1
1
6
To find the mean of RV given the probability distribution, sum the products of the random variable and its probability.
False
True
7
How many outcomes are there in a binomial setting?
One
Two
Three
Depends on situation
8
Which setting: What is the probability that a person plays a game 5 times until they win?
binomial
geometric
9
If p(a student buys coffee before school)=0.21, what is p(at most 5 out of 15 students buy coffee before school)
binompdf(15, 0.21, 5)
geometcdf(0.21, 5)
binomcdf(15, 0.21, 5)
geometpdf(0.21, 5)
10
If p(person prefers a sunny day) = 83%, what is the probability that 10 out of 12 people prefer a sunny day?
binompdf(12, 0.83, 10)
geometcdf(0.83, 10)
geometpdf(0.83, 10)
binomcdf(12, 0.83, 10)
11
If p(student passes a test) = 0.92, what is the probability that a student will first pass it on the third try?
binompdf(0.92, 3)
geometpdf(0.92, 3)
binomcdf(0.92, 3)
geometcdf(0.92, 3)
12
What condition is true for a binomial setting but not a geometric setting?
all are the same
fixed number of trials
probability stays the same
trials are independent
13
What is the standard deviation of 2X - X
9.539
10.247
15.652
12.124
14
What is the standard deviation of X - 2Y
23.491
21.262
13.304
17.464
15
Which setting: What is the probability that 8 out of 10 students take the AP Statistics exam?
Binomial
Geometric
