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Random Variables
Page 4
Questions (214)
Consider a binomial random variable X with parameters(4,1/2). Find the conditional probability mass function of X given that X
1 answer
asked by
sand
443 views
Consider a collection of n biased coins, each showing Heads with probability p and Tails with probability 1-p , independently of
2 answers
asked by
sand
556 views
Let X be a random variable that records the outcome of a dice toss. The probability distribution for X is as follows:
Outcome: 1,
3 answers
asked anonymously
46 views
The random variable is uniform in the (-2c,2c)interval . Find and sketch F(y) and f(y) if Y=X^2
1 answer
asked by
Anonymous
411 views
A random variable X2 assumes only positive value.?
2 answers
asked by
azriel ed pagayunan
582 views
Let Y be a Normal RV with mean 7 and standard devi-
ation 4. a. Find P (Y = 7). b. Find P (Y < 5). c. Find P (Y ≥ 10). d. Find
1 answer
asked by
Molly
397 views
The numbers $x_1,$ $x_2,$ $x_3,$ $x_4$ are chosen at random in the interval $[0,1].$ Let $I$ be the interval between $x_1$ and
3 answers
asked by
alice
39 views
If X is a random variable, what would the VARIANCE of Y be if Y=X+2
3 answers
asked anonymously
11 views
The numbers $x_1,$ $x_2,$ $x_3,$ $x_4$ are chosen at random in the interval $[0,1].$ Let $I$ be the interval between $x_1$ and
3 answers
asked by
alice
70 views
The numbers $x_1,$ $x_2,$ $x_3,$ $x_4$ are chosen at random in the interval $[0,1].$ Let $I$ be the interval between $x_1$ and
3 answers
asked by
alice
84 views
Five chips numbered 1-5 are placed in a jar. Two chips are drawn.
Let Z= the sum of the numbers. WHat is the expected value of
2 answers
asked by
MW
562 views
Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator
1 answer
asked by
chris
1,250 views
A random variable N has a cumulative distribution function given by
F(x)={ 0 for x<1 0.2 for 1<=x<2 0.5 for 2<=x<3 0.8 for 3<=x<4
1 answer
asked by
Julie
425 views
Eduardo has a red 6-sided number cube and a blue 6-sided number cube. The faces of the cubes are numbered 1 through 6.
Eduardo
5 answers
asked by
David
2,235 views
A random variable is used to find the number of items in a scavenger hunt being held by a local youth group. Identify the
1 answer
asked anonymously
35 views
The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.4 minutes and a standard deviation of 3
1 answer
asked by
larae
1,125 views
Determine whether the situation calls for a discrete or continuous random variable.
The number of freshmen in the required
2 answers
asked by
KiKi
1,114 views
A random variable has aprobability function p(x)=kx; x=1,2,3,4,5.find the value of k, p(x>=3),compute mean and variance of x.
2 answers
asked by
ahmed
977 views
Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the
2 answers
asked by
mike
951 views
Four jelly beans are selected, one at a time from a bowl containing 6 black, 6 red and 6 green jelly beans. Let x represent the
1 answer
asked by
kelly
964 views
A true-false test consists of 20 questions, each of which has one correct answer: true, or false. One point is awarded for every
10 answers
asked by
AmmanJordan
976 views
supposed that two balanced dice are rolled. let Y denote the product of the two numbers. use random variable notation to
1 answer
asked by
A
906 views
A fair die is toss six times. Defined a random variable as an odd number that appeared. Find the probability that exactly four
3 answers
asked by
Frederick
836 views
Classify the following as discrete or continuous random variables.
(A) The time it takes to run a marathon (B) The number of
3 answers
asked by
Jennifer
913 views
A die has 2 red faces, 2 blue faces, and 2 green faces. It is rolled 240 times. Let R be the number of times red faces appear,
49 answers
asked by
gerd
830 views
Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3
2 answers
asked by
Jennifer
520 views
Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3
1 answer
asked by
Jennifer
422 views
A fair coin is flipped independently until the first Heads is observed. Let the random variable K be the number of tosses until
1 answer
asked by
Adam
788 views
Determine whether the situation calls for a discrete or continuous random variable.
A)the cost of a random selected orange B)the
1 answer
asked by
Twg
419 views
Suppose X is a random variable with mean μ and standard deviation σ. If a large number of trials is observed, at least what
2 answers
asked by
titi
708 views
Suppose x is a random variable with mean and standard deviation. If a large number of trials is observed, at least what
2 answers
asked by
jake
708 views
Let X and Y be independent random variables, each uniformly distributed on the interval [0,1].
Let Z=max{X,Y}. Find the PDF of Z.
1 answer
asked by
alec
669 views
Can someone answer a question similar to a and b so I can use as an example.
Consider the following binomial random variables.
7 answers
asked by
Nora 512
621 views
The random variable X is exponential with parameter λ=1 . The random variable Y is defined by Y=g(X)=1/(1+X) .
a) The inverse
2 answers
asked by
Nesli
599 views
The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally
2 answers
asked by
DezShonna K
606 views
Let X and Y be two independent, exponentially distributed random variables with parameters ,lambda and mu, respectively.
1.Find
2 answers
asked by
Moreg
568 views
Compute E(X) for the following random variable X :
X=Number of tosses until getting 4 (including the last toss) by tossing a fair
2 answers
asked by
Nate
554 views
*Sigh* Can someone explain to me how I would work through this problem?
An honest coin tossed n=3600 times. Let the random
1 answer
asked by
SherylA
561 views
In your own line of work, give one example of a discrete
and one example of a continuous random variable, and describe why each
3 answers
asked by
Jen
553 views
The number of accidents that occur at the intersection of Pine and Linden streets between 3 pm. and 6 pm. on Friday afternoons
2 answers
asked by
Sarah
535 views
Break a stick of length 1 at a uniform location and then choose either of the two
parts with equal probabilities. If X denotes
2 answers
asked by
hsuan
504 views
Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from
10 answers
asked by
rishabh
527 views
Indicate whether the variable is a discrete or continuous random variable:
Number of candies in a bag
1 answer
asked anonymously
25 views
Indicate whether the variable is a discrete or continuous random variable:
How long you wait at a red light
1 answer
asked anonymously
10 views
Indicate whether the variable is a discrete or continuous random variable:
How much you weigh
1 answer
asked anonymously
15 views
Let X~B(16, 0.6) be a random variable distributed binomially.
What is the mean of the random variable
1 answer
asked anonymously
12 views
Nancy has classes three days a week. She attends classes three days a week 80% of the time, two days 15% of the time, one day 4%
1 answer
asked anonymously
63 views
A sixth form class consists of 6 girls and 9 boys. Three students from the class are chosen at random. The number of boys chosen
1 answer
asked by
Nabiha
504 views
Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from
6 answers
asked by
raja harishchandra
493 views
let X1,X2,X3 be random sample with pdf
f(x)=exp(-x),x>0,find the joint pdf of Y1=X1/X2, Y2=X3/(X1+X2) ,Y3=X1+X2, and find pdf of
0 answers
asked by
assma
474 views
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Parent Categories (10)
Conditional probability
Math/Statistics
Mathematics
Probability
Probability & Statistics
Probability and Statistics
Probability Distribution
Probability Theory
Statistics
Statistics and Probability