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Probability and Statistics
Page 4
Questions (4,610)
How many ways can an IRS auditor select 3 of 11 tax returns for an audit?
There are 8 members on a board of directors. If they
5 answers
asked by
Ashley
4,458 views
In a survey, 3 of 4 students said the courts show "too much concern" for criminals. Find the probability that at most 3 out of 7
5 answers
asked by
miyah
9,843 views
A random sample of 15 people is taken from a population in which 40% favour a particular political stand. What is the
6 answers
asked by
Cb
4,486 views
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then
25 answers
asked by
Anonymous
10,667 views
Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability
5 answers
asked by
Katy
5,913 views
Problem 4. Gaussian Random Variables
Let X be a standard normal random variable. Let Y be a continuous random variable such that
9 answers
asked by
infj
3,252 views
An assembly consists of three mechanical components. Suppose that the probabilities that the first, second, and third components
4 answers
asked by
Maureen
6,471 views
A spinner is divided into 4 sections labeled as K I N D Xavier reproduced the wheel and uses a computer to simulate the outcome
7 answers
asked by
Me
293 views
A letter is to be randomly picked from the word MISSISSIPPI. Which set of letters have equal chances to be selected?
2 answers
asked by
Koiiiii
136 views
A survey of 80 employees was conducted asking about which meals they regularly eat at the office. Twenty employees eat breakfast
2 answers
asked anonymously
225 views
Which of the following can be reasonably modeled by a normal distribution?
The favorite colors of students in a kindergarten
10 answers
asked by
Anonymous
30,572 views
Airline overbooking
For any given flight, an airline tries to sell as many tickets as possible. Suppose that on average, 20% of
3 answers
asked by
SK
1,305 views
Exercise: Convergence in probability
a) Suppose that Xn is an exponential random variable with parameter λ=n. Does the sequence
4 answers
asked by
Anonymous
1,372 views
In a family with 4 children what is the probability of having 1 boy and then 3 girls, in that order? (Exclude multiple births
5 answers
asked by
john
20,806 views
1. What is the experimental probability of rolling a 3?
A. 0.11**** B. 0.22 C. 0.30 D. 0.27 2. A quality control expert randomly
7 answers
asked by
Diane
2,835 views
a standard number cube is rolled 180 times. Predict how many times a 3 or 5 will be the result.
31 times 60 times 57 times 30
14 answers
asked by
Awesome
3,823 views
Two lamps are to be chosen from pack of 12 lamps where four are defective and the rest are non defective. what is the probablity
6 answers
asked by
Estifanos
2,372 views
A jar contains red and green balls. Someone will randomly selects a ball with the number points earned or lost. There are four
5 answers
asked by
Brandon
1,619 views
A drawer contains 64 balls. Each ball is one of 8 colors, and there are 8 balls of each color. If the balls in the drawer are
4 answers
asked by
Mickle
1,304 views
Let X be a random variable that takes integer values, with PMF pX(x) . Let Y be another integer-valued random variable and let y
4 answers
asked by
Ali
3,503 views
Selecting a letter of the alphabet: If 3 letters of the alphabet are selected at random, find the probability of getting at
4 answers
asked by
Anonymous
5,956 views
. There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it
5 answers
asked by
hannah
1,890 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.
3 answers
asked by
alec
866 views
An ordinary die is thrown seven times.find the probability of obtaining exactly three sixes
4 answers
asked by
Kleen
1,131 views
The probability a pupil takes a bus to school is 0.3. If a sample of 10 pupils are chosen at random. Using binomial
4 answers
asked by
Chris
1,443 views
Cola Corporation produces Orange Cola. The filling machines are adjusted to pour 12 ounces of soda into each 12-ounce can.
5 answers
asked by
Steven
2,662 views
A letter is picked random from the word COMPUTER. What is the probability that it is neither in the word met nor in the word up
6 answers
asked by
Anonymous
1,165 views
Two machines A and B produce respectively 60% and 40% of the total number of items of a factory. The percentages of defective
3 answers
asked by
chinthaka
2,204 views
In a survey of 300 college graduates, 58% reported that they entered a profession closely related to their college major. If 6
4 answers
asked by
Hannah
4,853 views
Four quilters are preparing patches for a quilt. When finished, the quilt will contain 200 patches. The quilters’
3 answers
asked by
chris
629 views
As part of a promotion, people who participate in a survey are sent a free coupon for one of three winter activities: skiing,
3 answers
asked anonymously
379 views
show me the next winning, the of winning 34,44,39,63,52 machine 16,35,77,66,80?
1 answer
asked by
King
308 views
Consider the random variables X, Y and Z, which are given to be pairwise uncorrelated (i.e., X and Y are uncorrelated, X and Z
3 answers
asked by
JuanPro
5,108 views
The random variables X and Y have a joint PDF of the form fX,Y(x,y)=c⋅exp{−12(4x2−8x+y2−6y+13)}
E[X]= var(X)= E[Y]=
5 answers
asked by
Ravi
4,398 views
Let N be a random variable with mean E[N]=m, and Var(N)=v; let A1, A2,… be a sequence of i.i.d random variables, all
4 answers
asked by
Anonymous
5,183 views
Tickets numbered 1 to 1000 were sold in a raffle for which there was one prize. Mr Kahn bought all the tickets containing at
5 answers
asked by
Paige
3,260 views
Problem 2. Continuous Random Variables
2 points possible (graded, results hidden) Let 𝑋 and 𝑌 be independent continuous
3 answers
asked by
peter
2,539 views
Each one of n persons, indexed by 1,2,…,n, has a clean hat and throws it into a box. The persons then pick hats from the box,
4 answers
asked by
qwerty
5,270 views
Cars arrive at a toll booth according to a Poisson process with mean 80 cars per hour.
How long can the attendant's phone call
7 answers
asked by
Sean
5,163 views
Bret and Shawn are playing a game where each turn the players roll a 20-sided die fair and then add the number they get to their
6 answers
asked by
glo
1,219 views
Suppose that X is an exponential random variable with parameter (and mean) equal to 1. Find the MAP estimate of X , given that
5 answers
asked by
CS
3,307 views
Suppose a bag contains 30 white marbles, 10 purple marbles, and 8 green marbles.
Question 1 One marble is randomly selected from
4 answers
asked by
One marble is randomly selected from the bag. In t
188 views
As in an earlier exercise, busy people arrive at the park according to a Poisson process with rate /hour. Relaxed people arrive
3 answers
asked by
Ali
1,411 views
PROBLEM 2
Let X and Y be independent random variables, with X uniformly distributed on [0,1] and Y uniformly distributed on
4 answers
asked by
SC
2,217 views
Let X be a standard normal random variable. Let Y be a continuous random variable such that
fY|X(y|x)=1/√2π*exp(−(y+2x)^2/2)
6 answers
asked by
TBONE
1,288 views
In a certain Algebra 2 class of 26 students, 21 of them play basketball and 7 of them play baseball. There are 2 students who
5 answers
asked by
Maddux
3,919 views
1.
Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a
22 answers
asked by
Skittles
8,890 views
The newest invention of the 6.041x staff is a three-sided die. On any roll of this die, the result is 1 with probability 1/2, 2
5 answers
asked by
qwerty
7,494 views
For all problems on this page, suppose you have data
X_1,\ldots ,X_ n \overset {\text {i.i.d.}}{\sim } \mathcal{N}(0,1) that is a
7 answers
asked anonymously
191 views
As in the last video, let X=delta+W, where delta and W are independent normal random variables and W has mean zero.
1. Assume
2 answers
asked by
Ramya
127 views
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