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Probability and Statistics
Page 7
Questions (4,610)
Solve the following defective rate problem using the concepts learned about the geometric distribution.
A machine that produces a
3 answers
asked anonymously
597 views
The random variables X and Y are jointly continuous, with a joint PDF of the form
fX,Y(x,y)={cxy,if 0≤x≤y≤1 0,,otherwise,
4 answers
asked by
pentium
2,409 views
Let X,Y,Z be independent discrete random variables with E[X]=2, E[Y]=0, E[Z]=0, E[X^2]=20, E[Y^2]=E[Y^2]=16, and
6 answers
asked by
Anonymous
3,151 views
For borrowers with good credit scores, the mean debt for revolving and installment accounts is $15,015 (BusinessWeek, March 20,
5 answers
asked by
Mia
6,044 views
This figure below describes the joint PDF of the random variables X and Y. These random variables take values in [0,2] and
5 answers
asked by
RVE
7,924 views
For each one of the following figures, identify if it is a valid CDF. The value of the CDF at points of discontinuity is
4 answers
asked by
RVE
4,221 views
Of 120 students, 60 are studying French, 50 are studying Latin and 20 are studying French and Latin. Find the probability that a
7 answers
asked by
Carline
7,756 views
Let Θ be a Bernoulli random variable that indicates which one of two hypotheses is true, and let P(Θ=1)=p. Under the
9 answers
asked by
A
7,563 views
A company estimates that 0.4% of their products will fail after the original warranty period but within 2 years of the purchase,
5 answers
asked by
tatiana
5,602 views
A customer at Cavallaro’s Fruit Stand picks a sample of 3 oranges at random from a crate containing 60 oranges, of which 4 are
4 answers
asked by
Brandon
4,400 views
Someone please help
2. You toss a coin 15 times. P(heads) 2/5 = • experimental; the result is found by repeating an experiment.
10 answers
asked by
Oscar
3,296 views
The average age of doctors in a certain hospital is 50.0 years old. Suppose the distribution of ages is normal and has a
4 answers
asked by
giovanny
3,506 views
A bag contains 5 green marbles , 8 red marbles, 11 orange marbles, 7 brown marbles, and 12 blue marbles. You choose a marbles,
7 answers
asked by
InDireNeedOfHelp
6,103 views
In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that
5 answers
asked by
Ashley
3,195 views
For each one of the following statements, indicate whether it is true or false.
(a) If X = Y (i.e., the two random variables
2 answers
asked by
silly_muffin
162 views
The random variables X and Y are jointly continuous, with a joint PDF of the form
fX,Y(x,y)= {cxy if 0≤x≤y≤1 0 otherwise}
4 answers
asked by
pentium
563 views
A game involves making a 3 by 3 grid with nine cards from a standard deck. You win if three cards in a row (horizontally,
3 answers
asked by
Haley
820 views
Sophia is vacationing in Monte Carlo. On any given night, she takes X dollars to the casino and returns with Y dollars. The
7 answers
asked by
Kina
5,888 views
A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the
4 answers
asked by
Anonymous
3,178 views
A 5-digit PIN code cannot begin with zero and the remaining digits have no restrictions. If repetition of digits is allowed,
4 answers
asked by
Anonymous
2,761 views
Let X be a random variable with PDF fX. Find the PDF of the random variable Y=eX for each of the following cases:
For general fX,
4 answers
asked by
janki
2,859 views
Suppose that X is a continuous random variable and that Y=X^4. Then, for y≥0 we have
fY(y)=ay^bfX(−cy^d)+ay^bfX(cy^d), for
4 answers
asked by
Anon
543 views
In this problem, you may find it useful to recall the following fact about Poisson random variables. Let X and Y be two
3 answers
asked by
Anonymous
1,067 views
Gani, a regular coffee drinker, goes to his favorite coffee shop every night for a cup of hot cappuccino. The amount of time
5 answers
asked by
Angel
913 views
In a number guessing game. You ask a person to guess a number from one 1 to 10. If the person makes a random guess, what is the
5 answers
asked by
Anonymous
5,608 views
FUNCTIONS OF A STANDARD NORMAL
The random variable X has a standard normal distribution. Find the PDF of the random variable Y,
4 answers
asked by
RVE
3,528 views
A fair coin is flipped independently until the first Heads is observed. Let K be the number of Tails observed before the first
4 answers
asked by
JuanPro
3,694 views
Let U, V, and W be independent standard normal random variables (that is, independent normal random variables, each with mean 0
6 answers
asked by
A
2,109 views
The random variables X and Y have the joint PMF
pX,Y(x,y)={c⋅(x+y)2,0,if x∈{1,2,4} and y∈{1,3},otherwise. All answers in
4 answers
asked by
clyde
6,712 views
The law of iterated expectations tells us that E[E[X/Y]] = E[X]. Suppose that we want apply this law in a conditional universe,
5 answers
asked by
silly_muffin
162 views
The chances of three independent events P, Q, R occuring are 1/2, 2/3, 1/4 respectively. What are the chances of two of them
2 answers
asked by
Susan
126 views
Aubree has a bag that contains orange chews, apple chews, and watermelon chews. She performs an experiment. Aubree randomly
2 answers
asked by
Gabrielle Abel
105 views
A bag contains 6 blue marbles, 7 green marbles, and 9 yellow marbles. Twice you draw a marble and replace it. Find P(yellow,
5 answers
asked by
Abigail waller
3,241 views
I need help. I am so so lost and need the answers and step by step if possible. I have tried everything but I think I'm just..
2 answers
asked by
mel
586 views
Suppose x is random variable with normal distribution (u,sigma^2) distribution and p(x<=0)=1/3 and p(x<=1)=2/3 what are the
7 answers
asked by
Star
841 views
1. Jamal writes the letters K-A-N-S-A-S on cards and then places the cards in a hat. What is the probability of picking an N? (1
7 answers
asked by
help pleas
3,542 views
"Records show that 8% of all college students are foreign students who also smoke. It is also known that 50% of all foreign
4 answers
asked by
kate
2,914 views
If a student randomly guesses at 15 multiple-choice questions, find the probability that the student gets exactly seven correct.
4 answers
asked by
danasiy
4,735 views
I need help. I got all of these questions out of 50 wrong. 6-10 were not given.
1. Which of the following is an example of
30 answers
asked by
Anonymous
6,009 views
Alice and Bob each choose at random a real number between zero and one. We assume that the pair of numbers is chosen according
9 answers
asked by
JuanPro
9,167 views
An airport limousine has four passengers and stops at six different hotels. What is the probability that two or more people will
4 answers
asked by
Anonymous
4,016 views
Ryan spent a dollar on a Tri-State Megabucks ticket, enticed by a big jackpot. Ryan chose six different numbers from 1 to 40,
4 answers
asked by
jane
834 views
A coin is tossed and a dice is rolled.
10.1 Represent the above scenario in a tree diagram. (2) 10.2 How many different possible
2 answers
asked anonymously
106 views
How do you use normal density function fomulae show with 2 examples?
2 answers
asked anonymously
102 views
Suppose X_1 is an observation for Bob, X_5 is an observation for Alice, X_7 is an observation for Charlie.
Using the following
2 answers
asked anonymously
154 views
A game involves spinning this spinner. What is the probability of the pointer landing on G?
spinner: R R R R B B G Y answer
7 answers
asked by
☆*: .。. o(≧▽≦)o .。.:*☆❤️❤️✨
140 views
There is a spinner with 15 equal areas, numbered 1 through 15. If the spinner is spun one time, what is the probability that the
1 answer
asked by
Adoette
123 views
A bag contains 6 red marbles, 4 blue marbles and 7 green marbles. If three marbles are drawn out of the bag, what is the exact
1 answer
asked anonymously
87 views
A spinner has three equal sections: blue, green, and purple. Josiah spins the spinner and tosses a coin. Which shows the sample
1 answer
asked by
James Glass
153 views
PROBLEM 4: PARKING LOT PROBLEM (3 points possible)
Mary and Tom park their cars in an empty parking lot with n≥2 consecutive
3 answers
asked by
JuanPro
2,590 views
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