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Probability and Statistics
Page 2
Questions (4,610)
Thirty percent of the students in a high school face a disciplinary action of some kind before they graduate. Of those students,
7 answers
asked by
hello
5,360 views
For each one of the following situations, state whether a Poisson model is a plausible model over the specified time frame.
The
4 answers
asked by
Jia
3,677 views
For t∈R, define the following two functions:
f1(t)=12π−−√exp(−max(1,t2)2) and f2(t)=12π−−√exp(−min(1,t2)2).
7 answers
asked by
Anonymous
2,413 views
Three different numbers are chosen at random from the set {1,2,3,4,5}. The numbers are arranged in increasing order. What is the
5 answers
asked by
Esmeralda
3,133 views
You roll a standard, six sided number cube. what is the probability of rolling a prime number or a number greater than 2.
9 answers
asked by
Roonie
10,672 views
8th----
Bob's phone plan has a voicemail service with the storage capacity of maximum 2 voice messages. Each morning, Bob checks
14 answers
asked by
BC
4,381 views
A letter is to be randomly picked from the word MISSISSIPPI. Which set of letters have equal chances to be selected?
A- S and I
4 answers
asked by
just living :>
433 views
In a company there are 7 executives: 4 women and 3 men. 3 are selected to attend a management seminar. Find these probabilities.
5 answers
asked by
Reuben Musundi
5,602 views
Let X and Y be independent continuous random variables that are uniformly distributed on (0,1). Let H=(X+2)Y. Find the
5 answers
asked by
Diane Lin
2,515 views
Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine's
7 answers
asked by
Anonymous
4,176 views
Let Θ1, Θ2, W1, and W2 be independent standard normal random variables. We obtain two observations,
X1=Θ1+W1,X2=Θ1+Θ2+W2.
4 answers
asked by
AAA
3,943 views
You are given the set of letters ( A, B, C, D, E ). What is the probability that in a random five-letter string (in which each
5 answers
asked by
qwerty
5,032 views
Problem 3: Checking the Markov property
For each one of the following definitions of the state Xk at time k (for k=1,2,…),
5 answers
asked by
RVE
3,565 views
Problem 2: Oscar's running shoes
Oscar goes for a run each morning. When he leaves his house for his run, he is equally likely to
5 answers
asked by
RVE
4,677 views
3 letters are typed, with repetition allowed. What is the probability that all 3 will be vowels? Write your answer as a percent.
5 answers
asked by
Berta
5,320 views
By the argument in the last video, if the Xi are i.i.d. with mean μ and variance σ2 , and if Mn=(X1+⋯+Xn)/n , then we have
5 answers
asked by
SK
2,869 views
a coin is tossed and a die is thrown. what is the probability of getting a head and a perfect square?
12 answers
asked by
peace
4,936 views
Calculate the expected value of the number of cups of coffee Alex drinks each day
1 answer
asked anonymously
57 views
Use the spinner to simulate the random selection of two letters with repetition from the word CLEAN. This will constitute one
2 answers
asked anonymously
161 views
A money envelope contains five $10 bills, ten $20 bills, and fifteen $50 bills. Sandra randomly selects two bills without
3 answers
asked anonymously
201 views
Let X and Y be jointly continuous nonnegative random variables. A particular value y of Y is observed and it turns out that
5 answers
asked by
AK
3,264 views
On a certain road 20% of the vehicles are trucks, 16% are buses and the remainder are cars.
(i) A random sample of 11 vehicles is
5 answers
asked by
Josh
5,183 views
outcomes : 2, 4, 6, 8, 10, 12
Frequency : 10, 9, 6, 15, 13, 8 Jede tossed a cube with faces numbered with 2, 4, 6, 8, 10, and 12.
2 answers
asked by
Koiiiii
227 views
in a shipment of 20 computers, 3 are defective
three computers are randomly selected and tested. what is the probability that all
5 answers
asked by
Sara!
7,454 views
The random variables Θ and X are described by a joint PDF which is uniform on the triangular set defined by the constraints
5 answers
asked by
Anonymous
4,884 views
The life time of a certain kind of batteries has a mean life of 400 hours and standard deviation as 45 hours. Assuming the
4 answers
asked by
Kruti
2,643 views
Cross out the part of the concept circle that does not belong. Then describe the relationship among the remaining parts. a coin
1 answer
asked anonymously
137 views
A bag contains 4 white, 3 blue, and 5 red marbles.
1. Find the probability of choosing a red marble, then a white marble if the
66 answers
asked by
jjiiddss
25,463 views
A student has passed 60 percent of the 20 quizzes he has written so far successfully. If the student writes 50 quizzes during
9 answers
asked by
allie
9,435 views
Helen has some black tiles, some white tiles and some grey tiles. She places a single row of
8 tiles above her washbasin. Each
4 answers
asked by
Raj
2,780 views
1.
You flip a coin 30 times and get heads 11 times, so the chance of getting heads is eleven over thirty . Is this an example of
82 answers
asked by
Delilah
29,217 views
A die is tossed. Find the odds against rolling a number greater than 2
The odds against rolling a number greater than 2 are __ :
4 answers
asked by
Beth
13,076 views
A fair coin is tossed repeatedly and independently. We want to determine the expected number of tosses until we first observe
4 answers
asked by
qwerty
2,741 views
Your drawer contains 7 red socks and 6 blue socks. It's too dark to see the color of the socks, so you randomly pull two socks
4 answers
asked by
Anonymous
1,520 views
If 8% of the population of trees are elm trees, find the probability that in a sample in a sample of 100 trees, there are
6 answers
asked by
Michelle
4,198 views
As in the previous exercise, let È be the bias of a coin, i.e., the probability of Heads at each toss. We assume that È is
5 answers
asked by
alec
5,364 views
Let Θ be a continuous random variable that represents the unknown bias (i.e., the probability of Heads) of a coin.
a) The prior
4 answers
asked by
Anonymous
3,600 views
Let È be the bias of a coin, i.e., the probability of Heads at each toss. We assume that È is uniformly distributed on [0,1].
4 answers
asked by
alec
5,062 views
The numbers of cookies in a shipment of bags are normally distributed, with a mean of 64 and a standard deviation of 4. What
7 answers
asked by
Skye
8,133 views
Which of the following statements is true about the t-distribution with k degrees of freedom?
i. the t-distribution is symmetric
4 answers
asked by
Anonymous
9,388 views
A school is holding a fundraising raffle. The first prize is $500, the five second prizes are $100 each, and the ten third
4 answers
asked by
Winny
2,115 views
Bonita bought her mom a charm bracelet. Each charm is labeled with a one-word message.
What is the probability that the 5 charms
3 answers
asked by
nfngs
987 views
A math class contains 7 females (three of whom speak French and the rest speak only English),and 12 males (two of whom speak
5 answers
asked by
jennifer
5,314 views
The random variable X is uniformly distributed over the interval [θ,2θ]. The parameter θ is unknown and is modeled as the
11 answers
asked by
A
8,799 views
A basket of fruits contains 5 bananas, 8 mangoes, and 7 apples. Two fruits are randomly selected without replacement. Calculate
3 answers
asked by
Cheezet
369 views
if the bowl contains 5 red marbles 7 blue marbles and 8 white marbles what is the probability you will draw a red or blue
6 answers
asked by
Maria
2,190 views
Bowls A and B contain a number of white and red balls. Clark repeatedly selected a ball from both bowls and recorded the results
3 answers
asked by
Yo mama
742 views
A newly-opened restaurant has 5 menu items. If the first 4 customers each choose one menu item uniformly at random, the
6 answers
asked by
anonymous
3,708 views
A number cube is rolled 100 times. The results are shown in the table below.
Outcome: 1, 2, 3, 4, 5, 6. Number of times rolled:
22 answers
asked by
Help! pls
7,063 views
Two identical biased coins are tossed together, and the outcome is recorded. After a large number of trials it is observed that
4 answers
asked by
Harry
1,399 views
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