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Probability and Statistics
Page 9
Questions (4,605)
For this section, use the following distributions: 1) A direwolf has a 70% probability of killing a stag upon encounter; 2) a
2 answers
asked by
Kathleen
487 views
A multiple choice test has 16 questions. Each question has 4 possible answers with
only one is correct. Assume that all questions
4 answers
asked by
hassan
1,328 views
The life of automobile voltage regulators has an exponential distribution with a mean life of six years. You purchase an
4 answers
asked by
ash
2,111 views
At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council
4 answers
asked by
Janet
2,796 views
The random variable X has a PDF of the form
fX(x)={1x2,0,for x≥1,otherwise. Let Y=X2 . For y≥1 , the PDF of Y it takes the
4 answers
asked by
Anon
1,973 views
Consider the same model of two rolls of a tetrahedral die, with all 16 outcomes equally likely. Find the probability of the
7 answers
asked by
two time
2,612 views
Assume that the salaries of elementary school teachers in the U.S. are normally distributed with a mean of $37,000 and standard
3 answers
asked by
Anonymous
1,605 views
Let X and Y equal the outcomes when two fair six-sided dice are rolled. Let
W = X + Y. Assuming independence, find the p.m.f. of
2 answers
asked by
Sandy
865 views
An urn contains 5 red balls and 10 white balls. 6 balls are randomly drawn and not replaced. What is the probability that 3 or
3 answers
asked by
Gina
663 views
A combination lock has 10 dials. To
open the lock, you must turn the dial right to the first number, left to the second number.
1 answer
asked by
Nina PLEASE
438 views
A loaded die has the property that the probability of throwing an odd number is three time the probability of throwing an even
2 answers
asked by
A loaded die
509 views
The newest invention is a three-sided die. On any roll of this die, the result is 1 with probability 1/2, 2 with probability
4 answers
asked by
qwerty
4,008 views
Could someone please check this and let me know if I'm doing it correctly?
Sammy and Sally each carry a bag containing banana,
2 answers
asked by
Mary
632 views
a box contains 25 computer diskettes, 5 of which are double density and the remiander are high density. A second box contains 15
3 answers
asked by
Josh_DB9
422 views
The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable.
a)
1 answer
asked by
Jamey
456 views
find the normal approximation for the binomial probability that x=5,where n=12, and p=0.7compare probability to table b of
2 answers
asked by
vedry frustrated please help and show work
950 views
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and
distribution
3 answers
asked by
Anonymous
1,921 views
Customers arrive at Paul Harrold¡¯s styling shop at a rate of 3 per hour, distributed in a Poisson fashion. Paul a perform
1 answer
asked by
jkjk
813 views
Suppose 10% of the flights arriving at an airport arrive early, 60% arrive on time, and 30% arrive late. Valerie used the
4 answers
asked by
Anonymous
1,328 views
A team averages 7 losses for every 13 games it wins.
If ties are not permitted, what is the probability that the team will win
5 answers
asked by
Isabel
975 views
The probability that a person catches a cold during the cold and flu season is 0.62. Assume that 5 people are chosen at random.
A
2 answers
asked by
agak
958 views
A company has 2 machines. On any day, each machine that is working has a 1/3 chance of breaking down. If a machine breaks down
3 answers
asked by
Denise
1,869 views
Suppose we have an urn with 10 white balls and 6 red balls, and we create an experiment by randomly selecting 6 balls from the
3 answers
asked by
Em
709 views
The marketing director of a department store interviewed 50 customers who had bought appliances the previous week. They found
3 answers
asked by
Sharon
758 views
A factory produces a particular type of electronic component. The probability of a component being acceptable is 0.95. The
4 answers
asked by
Koylar
889 views
Box A contains 3 white marbles and 4 black marbles. Box B contains 6 white marbles and 5 black marbles. An experiment consists
3 answers
asked by
Katie
3,011 views
A box contains 10 transistors,4 of which are defective. If 4 are selected at random, find the probability that
a. All are
4 answers
asked by
Beth
3,806 views
1. You mix the letters: S E M I T R O P I C A and L thoroughly. Without looking you draw one letter. Find the probability that
5 answers
asked by
Cj So Cool
2,677 views
A certain system can experience three different types of defects. Let Ai (i = 1,2,3) denote the event that the system has a
2 answers
asked by
Patrick
1,034 views
A disease affects 9% of individuals in a population and a sample of 100 people is selected from the population. What is the
1 answer
asked by
Lindz
393 views
The next generation of miniaturized wireless capsules with active locomotion will require
two miniature electric motors to
3 answers
asked by
Jafer
2,357 views
5.70 The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime,
1 answer
asked by
Anonymous
518 views
A total of 16 mice are sent down a maze, one by one. From previous experience, it is
believed that the probability a mouse turns
1 answer
asked by
andy
419 views
According to Masterfoods, the company that manufactures M&M’s,
12% are brown, 15% are yellow, 12% are red, 23% are blue, 23%
4 answers
asked by
ess
3,714 views
A six-sided die is rolled six times. What is the probability that the die will show an even number exactly two times?
4 answers
asked by
Mei
1,481 views
Let U, V, and W be independent standard normal random variables (that is, independent normal random variables, each with mean 0
1 answer
asked by
qwerty
1,003 views
Let Θ1 and Θ2 be some unobserved Bernoulli random variables and let X be an observation. Conditional on X=x, the posterior
3 answers
asked by
akg
1,237 views
Let X, Y, Z, be independent discrete random variables.
Let A= X(Y+Z) and B= XY With A, B, X, defined as before, determine wheter
4 answers
asked by
P
1,513 views
Alice has five coins in a bag: two coins are normal (i.e., fair with one face Heads and the other face Tails), two are
7 answers
asked by
qwerty
1,305 views
As on the previous page, let X1,…,Xn be i.i.d. with pdf
fθ(x)=θxθ−11(0≤x≤1) where θ>0. (a) 2 puntos posibles
2 answers
asked by
Juanpro
626 views
1. You mix the letters: S E M I T R O P I C A and L thoroughly. Without looking you draw one letter. Find the probability that
109 answers
asked by
Rebekah
25,368 views
You have been hired as the quality control office of a pharmaceutical company that manufactures aspirin tablets. According to
7 answers
asked anonymously
97 views
We are given a biased coin, where the probability of Heads is q. The bias q is itself the realization of a random variable Q
5 answers
asked by
Anonymous
1,921 views
The random variables delta and X are described by a joint PDF which is uniform on the triangular set defined by the constraints
28 answers
asked by
Ramya
121 views
1. the probability of a basketball player hitting a foul shot is 1/3. how many shots would you expect her to make in 90
5 answers
asked by
Anon
3,828 views
Random variables X and Y are distributed according to the joint PDF
fX,Y(x,y) = {ax,0,if 1≤x≤2 and 0≤y≤x,otherwise. 1
3 answers
asked by
JuanPro
951 views
The probabilities that john and joseph pass an examination is 3/4 and 3/5 respectively. Find the probability that both boys
4 answers
asked anonymously
87 views
There are 219 people at science camp. 112 people are enrolled in chemistry class and 45 people are enrolled in the physics
10 answers
asked by
Mason Cons
159 views
During an experiment, three coins were tossed at once. Part A: Give the sample space to show all possible outcomes for tossing
2 answers
asked by
John B
156 views
Let X and Y be independent random variables, each uniformly distributed on the interval [0,1]
a) Let Z = max{X,Y}. Find the PDF
2 answers
asked by
silly_muffin
123 views
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